Question

One mole of an ideal gas is expanded freely and isothermally at 300K from 5L to 10L volume. If `Delta E =0`, then `Delta H` is
A. zero
B. `5 xx 300` cal
C. 5 cal
D. `-2 xx 5 xx 300` cal

Answer 1

Correct Answer - A
When the gas expands freely it means that the opposing pressure is zero. Hence `pDeltaV=0` or `DeltaH=0`