the rules of heat

1. **反应热大小比较规则** - **根据物质状态判断**：当物质由固态变为液态再变为气态时，这个过程需要吸收热量。所以在比较反应热大小时，如果反应产物状态不同，气态产物对应的反应通常比液态产物对应的反应吸收更多热量（反应热数值更大且为正值），液态产物对应的反应比固态产物对应的反应吸收更多热量（反应热数值更大且为正值）;反之，在放热反应中，气态反应物变为液态或固态反应物时，反应放出的热量更多（反应热数值更大且为负值）。 - **根据反应类型判断**：不同类型的反应热效应不同。例如，燃烧反应通常是放热反应，反应热为负值;而分解反应有些是吸热反应，反应热为正值。一般来说，放热反应的反应热（\(\Delta H\)）数值小于0，放热越多，\(\Delta H\)数值越小;吸热反应的反应热（\(\Delta H\)）数值大于0，吸热越多，\(\Delta H\)数值越大。 - **根据化学计量数判断**：在热化学方程式中，反应热数值与各物质的化学计量数成正比。例如，对于反应\(aA + bB=cC + dD\)，如果化学计量数变为\(2aA + 2bB = 2cC+2dD\)，则反应热\(\Delta H\)也变为原来的2倍。在比较反应热大小时，如果两个反应相似，化学计量数大的反应，其反应热数值也会按比例增大（吸热反应增大正值，放热反应增大负值）。 2. **反应热计算规则** - **根据盖斯定律计算** - 首先要明确所求反应的始态和终态、各物质的化学计量数及反应的吸、放热情况。不同途径对应的最终结果应一样。 - 当热化学方程式乘以或除以某一个数时，\(\Delta H\)也应乘以或除以同一个数;方程式进行加减运算时，\(\Delta H\)也同样要进行加减运算，注意各步反应\(\Delta H\)的正负。 - 将一个热化学方程式逆向书写时，\(\Delta H\)的符号也随之改变，但绝对值不变。 - **根据标准摩尔生成焓计算（定温定压过程）**：反应的标准摩尔焓变等于产物的标准摩尔生成焓之和减去反应物的标准摩尔生成焓之和，即\(\Delta_{r}H_{m}=\sum\Delta_{f}H_{m}\)（总生成物）\(-\sum\Delta_{f}H_{m}\)（总反应物）（如果有参考状态单质，则其标准摩尔生成焓为零）。 - **根据标准摩尔燃烧焓计算（定温定压过程）**：反应的标准摩尔焓变等于反应物的标准摩尔燃烧焓之和减去产物的标准摩尔燃烧焓之和，即\(\Delta_{r}H_{m}=\sum\Delta_{c}H_{m}\)（总反应物）\(-\sum\Delta_{c}H_{m}\)（总生成物）（参考状态单质只适用于标准摩尔生成焓，其标准摩尔燃烧焓不为零）。 - **根据化学键的键能计算**：化学反应中的反应热\(\Delta H=\)反应物的总键能 - 生成物的总键能;也可以根据\(\Delta H=\)生成物的总能量 - 反应物的总能量计算。 - **根据热化学方程式计算**：热化学方程式中反应热数值与各物质的化学计量数成正比。例如已知生成一定量某物质的反应热，可根据化学计量数比例关系计算其他量对应的反应热。 <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>

Heatstroke was a disorder of the central nervous system and circulatory system caused by the body's body temperature regulation in a high temperature environment. According to its mechanism, it can be divided into heatstroke, heat spasm, and heat exhaustion. Heat exhaustion was a relatively mild form of heatstroke. It was mainly due to long-term activity in a high-temperature environment. After sweating a lot, the body lost too much salt and water, resulting in dehydration and insufficient blood circulation. There were symptoms such as hyperhidrosis, wet and cold skin, pale face, nausea, dizziness, significantly increased heart rate, low blood pressure, oliguria, etc., which could be accompanied by dizziness and syncope. The body temperature often rose but did not exceed 40 ° C. Some patients only had high body temperature in the early stage. Heat spasms are caused by excessive sweating and loss of vitamins (especially loss of Na), resulting in muscle spasms and pain. Common symptoms include muscle spasms, pain, and cramps, which mostly occur in the muscles of the limbs, masticatory muscles, and abdominal muscles (especially the calf muscle). They are symmetrical, and the body temperature is generally normal. Heatstroke was the most serious form of heatstroke. It was extremely harmful to human life and had a high mortality rate. When the body temperature is too high (more than 40 ° C), and the heat cannot be distributed through sweating and heat radiation, there will be severe central nervous system malfunction and circulatory system failure, such as high fever, loss of consciousness, convulsions, increased heart rate, breathlessness, hot and dry skin, etc. There may also be general convulsions, rhabdomyolysis, multiple organ malfunction syndrome, etc., which can easily lead to multiple organ failure. In general, heatstroke was a broad concept. Heatstroke, heat spasms, and heat exhaustion were different types. Heatstroke was the most serious. The novel "Watching the Moon on Fish Island" is equally exciting. Everyone is welcome to click and read it!

'Bright Days' was a widely used term that could refer to different works. There were two possible answers. First of all, according to the description in the first document, the children's group dance " Bright Days " was a dance that emphasized expressiveness and neatness. It mainly talked about the innocence and childlike fun of childhood. This could be the name of a children's dance performance or competition. Secondly, according to the description of the second and third documents, there was also a TV series called " The play tells the story of four brothers in Beijing's alleys from youth to middle age. The drama was first broadcasted in 2017 and was directed by Zhou Youchao. Zhang Jiayi, Guo Jinglin, Jiang Wu, and other leading actors were also involved. This could be an urban romance drama. To sum up," Bright Days " could refer to the children's group dance " Bright Days " or the TV series " Life is a Bright Day."

Liquefaction was an exhalation process. The novel " Watching the Moon on Fish Island " is equally exciting. Everyone is welcome to click and read it!

The correct way to write it was to stick to the old rules, which meant that one would not change the old rules. It was a pejra. The origin of this idiom was related to the story of Mozi's good defense of the city. Later, it gradually evolved to express stubbornness and conservativeness, not thinking of reform and progress. The novel,"The Morality of the Past", is equally exciting. Everyone is welcome to click and read it!

The rules of the single match were as follows: 1. Rules of service: - The serve had to be outside the service line. It could not step on the line. If it grazed the net and crossed the service line, it would be considered valid if it did not go out of bounds. - Both sides of the boundary line were based on the inside line, and the bottom line was based on the outside line. As long as it was within the line or pressed against the line, it was considered valid. - The serve could not be over the waist, and the hitting point could not be above the hand and waist. Otherwise, it would be considered a foul and the opponent would score directly. - At the start of the game, the players would stand in the right half of the court. After that, they would stand in the left half according to the score. If the score was odd, they would stand in the left half. If the score was even, they would stand in the right half. - The server only has one chance to serve. The service ends when the ball touches the server's racket or falls to the ground. 2. Scoring and changing sides: - The overall situation was based on the best of three games. Each small game had 21 points. Whoever reached 21 points first and led the other by two points would be considered the winner. Any side that obtained 11 points first would switch places. If the score was 21:20, they would stall for time. Whoever led by two points first would win. Otherwise, it would depend on who reached 30 points first. The next game would be started by the winner of the previous game. 3. The rules of hitting the ball: - No part of his body could touch the ball. He could only hit the ball with the racket. - It was not considered a foul if the ball hit the other party (but it could not be used to hit people, which was detrimental to sportsmanship). 4. Foul rules: - It was a foul for the ball to touch the player's body or clothes. - It was a foul for the ball to fall outside the boundary of the field. - It was a foul for the ball to pass through or under the net. - The ball hitting the ceiling or the surrounding walls is a foul (in certain circumstances, if the ceiling of the court is too low, it can be agreed upon by both parties. If the ball hits the ceiling, it is illegal or it will be served again). - After the ball touched the racket, it was a foul to continue flying to the backcourt. - Dragging (when the ball stops on the racket and is then dragged away and thrown) is a foul. - It is a foul to hit the ball through the net (the initial point of contact between the racket and the ball is not on the side of the net where the batsman is). - Touching the net (the player's racket, body, or clothing touching the net or its support) is a foul. - A player's racket or body intruding into the opponent's court from the net (after the batsman hits his ball, the racket can carry the ball over the net, which is not considered a violation) is a foul. - A player's racket or body intrudes into the opponent's court from under the net, causing the opponent to hit the ball or distract the opponent's attention. - Obstructing the opponent (preventing the opponent from hitting the ball close to the net, such as putting the ball back in front of the net, raising the racket high to prevent the opponent from picking up the golf ball) is a foul. - It is a foul for an athlete to deliberately distract the opponent (such as shouting, pretending, etc.). - A combo (two consecutive swings by the same player, or two consecutive hits by two players on the same side) is a foul. While watching the Olympics, you can also read the wonderful novels related to the Olympics!

Liquid vaporizing was an heat-absorbing process. In this process, the liquid molecules would change from the liquid surface or the interior to the gaseous molecules, which required energy consumption. Therefore, it would need to absorb heat from the outside world. For example, the drying of wet clothes and the turning of water into steam were all phenomena of liquid vaporizing. These processes were accompanied by the absorption of heat. The novel " Watching the Moon on Fish Island " is equally exciting. Everyone is welcome to click and read it!

Liquefaction referred to the process of a substance changing from a gaseous state to a liquid state. This process would release heat to the outside world. In the change of state of matter, melting, vaporizing, and sublimation needed to absorb heat, while liquifying, solidifying, and condensing needed to emit heat. The novel " Watching the Moon on Fish Island " is equally exciting. Everyone is welcome to click and read it!

The heat of reaction refers to the heat released or absorbed by a chemical reaction under constant pressure and without any non-expansion work. If the temperature of the product returns to the initial temperature of the reagent, the system will release or absorb heat. When the heat of reaction is less than 0, it is an exhalation process, that is, the value of the heat of reaction is equal to the amount of heat released (at this time, the amount of heat released is positive); when the heat of reaction is greater than 0, it is an absorption process. At this time, the reaction absorbs heat instead of releasing heat. In short, the heat of the reaction was a representation of the amount of heat released (the values were equal, but the signs were opposite). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The symptoms of lung heat may include coughing, expectoration (dry, sticky, yellow, or even bloodshot phlegm), suffocation, fever, fear of cold, dry mouth and sore throat, etc.; Stomach heat may cause heartburn, stomach pain, acid aversion, bad breath, yellow and thick tongue coating, easy to vomit and other symptoms. For lung heat, it is necessary to nourish yin and moisten the lung. When evil qi invades the deep part of the lung and turns into heat, it can nourish yin and nourish the lung, moisten dryness and cough. For example, refer to Yiqi Bufei Soup. For gastric heat and acid aversion, to purge fire and clear the stomach, you can refer to Quresheng Stomach Soup. In addition, it was best to quit smoking and drinking in life. Don't eat spicy food, eat more fruits and vegetables, and drink more water. If there was an increase in white blood cells and C-reaction protein in the lung fever, it might be a bacteria infection. Treatment such as amoxicillin-clavulanate, flurazuron, and cephem could be given. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>