Question

A gas is confined to a cylinder under constant atmospheric pressure.When 600J of heat IS added to the gas . It expands and does 140J of Work on the surroundings . What are the values of ∆H and ∆E.

Answer 1

As heat is being added, the value of q (that is equal to ∆H) is positive:

$\Delta H=600\text{ J}$

To find ∆E we need to calculate the difference between ∆H and w (work):

$\Delta E=600J-140J=460J$