Question

$2$ mol of an ideal gas expanded isothermally and reversibly from $1$L to $10$L at $300$K. What is the enthalpy change?

• A. $4.98$ kJ
• B. $11.47$ kJ
• C. $-11.47$ kJ
• D. $0$ kJ

Answer 1

The correct option is D $0$ kJ

Let us consider the problem:

$H=E=PV$

and

$\Delta H=\Delta E+\Delta \left(PV\right)$

Or

$\Delta H=\Delta E+nR\Delta T$

Since,

$\Delta T=0$

$\Delta E=0$

$\Delta H=0$