我想了解1 law thermodynamics.那里有实际例子？？

kangkang_107

各位大大：
*先拜会*

我想了解1 law thermodynamics.那里有实际例子？？
我懂一些，但又不完全懂。。

我吃饭吃米。。。靠你们了。。。。

chan1314

dU = dQ -dW

When a system undergoes infinitesimal (很小）change in state in which a small amount of energy dQ is transferred by heat and small amount of work dW is done , the internal energy changes by a small amount dU.

例子能用 thermostat , （thermal expansion for liquid and solid)
phase change (liquid to gas etc) 等