thermodynamics

Question: Which is the correct statement



1) For an isothermal change PV = constant
2) In an isothermal process the change in internal energy must be equal to the work done
3) For an adiabatic change $\frac{{{P}_{2}}}{{{P}_{1}}}={{\left( \frac{{{V}_{2}}}{{{V}_{1}}} \right)}^{\gamma }}$, where $\gamma $ is the ratio of specific heats
4) In an adiabatic process work done must be equal to the heat entering the system
Solution: Explanation: No Explanation
Adiabatic Process

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