What is the change in internal energy for 0.7 moles of an ideal gas heated from 280 K to 340 K at constant volume? ( C_v
**Adiabatic work** W = ∫ P dV = (P₁V₁ - P₂V₂)/(γ-1), for expansion V₂>V₁ P₂
Ref: NCERT > Physics Book > Thermodynamics > Adiabatic Processes and Gamma Determination