Solveeit Logo
Login

Question

Chemistry Question on Thermodynamics terms

During isothermal expansion of ideal gas, its

A

internal energy increases

B

enthalpy increases

C

enthalpy reduces to zero

D

enthalpy remains unchanged

Answer

enthalpy remains unchanged

Explanation

Solution

During isothermal expansion o f an ideal gas, Δ T=0\Delta\,T=0 Now, H=E+PVH=E+PV ∴Δ H=Δ E+(PΔV)\therefore \Delta\,H=\Delta\,E+(P \Delta V) =Δ E+Δ(nRT)=\Delta\,E+\Delta(nRT) =E+nRΔ T=0+0=0=E+nR \Delta\,T=0+0=0