Question

An ideal gas is compressed isothermally. What is the change in internal energy of gas

Answer 1

Answer : The change in internal energy of gas is zero.

Explanation :

Isothermal process : It is a process in which temperature of system remains constant.

T = constant, dT = 0

As we know that,

$\Delta U=nC_vdT$

As in the isothermal process, T = constant, dT = 0

So, $\Delta U=0$

That means internal energy is temperature dependent quantity.

Hence, the change in internal energy of gas is zero.