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→Account given by Clausius
===Account given by Clausius===
===Account given by Clausius作者: 克劳修斯===
[[File:Clausius-1.jpg|thumb|upright|Rudolf Clausius]]
[[File:Clausius-1.jpg|thumb|upright|Rudolf Clausius]]
where
where: ''S'' is the entropy of the system and
: ''S'' is the entropy of the system and
S is the entropy of the system and
S is the entropy of the system and
t is time.
t is time.
where
这里''S'' 是系统的熵，T是时间
Here
Here : <math>\dot Q</math> is the heat flow into the system
: <math>\dot Q</math> is the heat flow into the system
<math>\dot Q</math> is the heat flow into the system
<math>\dot Q</math> is the heat flow into the system
<math>\dot Q</math> 是进入系统的热流。
<math>\dot Q</math>
: <math>T</math> is the temperature at the point where the heat enters the system.
: <math>T</math> is the temperature at the point where the heat enters the system.
<math>T</math> is the temperature at the point where the heat enters the system.
<math>T</math> is the temperature at the point where the heat enters the system.
<math>T</math> 是热<s>量</s>进入系统时的温度。
Here
这里<math>\dot Q</math>是进入系统的热流，<math>T</math> 是热<s>量</s>进入系统时的温度。