# Differences

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 phy141kk:lectures:34-18 [2018/11/29 17:51]kkumar [Free expansion] phy141kk:lectures:34-18 [2018/11/29 17:58]kkumar [Quasistatic adiabatic expansion of a Gas] Both sides previous revision Previous revision 2018/11/29 17:58 kkumar [Quasistatic adiabatic expansion of a Gas] 2018/11/29 17:54 kkumar [Molar Specific Heat for Gases] 2018/11/29 17:51 kkumar [Free expansion] 2018/11/29 17:47 kkumar [Adiabatic Process] 2018/11/25 10:51 kkumar created Next revision Previous revision 2018/11/29 17:58 kkumar [Quasistatic adiabatic expansion of a Gas] 2018/11/29 17:54 kkumar [Molar Specific Heat for Gases] 2018/11/29 17:51 kkumar [Free expansion] 2018/11/29 17:47 kkumar [Adiabatic Process] 2018/11/25 10:51 kkumar created Line 137: Line 137: which means that all the heat applied to the system goes in to raising the temperature. which means that all the heat applied to the system goes in to raising the temperature. - If we change the temperature the same amount constant pressure work will be done as the gas expands so + If we change the temperature the same amount ​at constant pressure work will be done as the gas expands so $Q_{P}=\Delta E_{int}+P\Delta V$ $Q_{P}=\Delta E_{int}+P\Delta V$ Line 187: Line 187: ===== Quasistatic adiabatic expansion of a Gas ===== ===== Quasistatic adiabatic expansion of a Gas ===== - The adiabatic expansion I demonstrated was far from quasistatic! ​However if we consider a quasistatic adiabatic expansion we can derive a useful relationship between pressure and volume in terms of the molar heat capacities we just considered. As $dQ=0$ + /* + The adiabatic expansion I demonstrated was far from quasistatic! ​ + + */ + + If we consider a quasistatic adiabatic expansion we can derive a useful relationship between pressure and volume in terms of the molar heat capacities we just considered. As $dQ=0$ $dE_{int}=dQ-dW=-dW=-PdV$ $dE_{int}=dQ-dW=-dW=-PdV$