Question

In which of the following AH = AU?
(1) N2(g) + 3H,(g)—→ 2NH3(g)
(3) PCI5(g) —>PCl3(g) + Cl2(g)
2) C(s) + O2(g) —>CO2(9)
(4)CaCO3(s) + Ca(s) + CO2(g)

Answer 1

Answer:

C(s) + O2(g) —› CO2(g)

Explanation:

This is because

The difference in the number of moles is zero

Difference in moles = number of moles of products in gaseous state – number of moles of reactants