In Which of the Following Processes Is $\Delta$ H = $\Delta$ E ?
A) Two Moles of Ammonia Gas Are Cooled

In which of the following processes is $\Delta$ H = $\Delta$ E ?

A) Two moles of ammonia gas are cooled from 325 $\degree$ C to 300 $\degree$ C at 1.2 atm.
B) One gram of water is vaporized at 100 $\degree$ C and 1 atm.
C) Two moles of hydrogen iodide gas react to form hydrogen gas and iodine gas in a 40-L container.
D) Calcium carbonate is heated to form calcium oxide and carbon dioxide in a container with variable volume.
E) One mole of solid carbon dioxide sublimes to the gas phase.