When 44.0 g of solid carbon dioxide at 1.00 atm pressure are reversibly converted to vapour at
1 atm pressure and −78 °C, 25.33 kJ of heat are absorbed by the system. The density of solid
CO2 is 1.56 g cm−3
.
3. ∆H for this process is (in kJ):
(1) −23.71 (2) +23.71 (3) −25.33 (4) +25.33 (5) +26.95

Question

When 44.0 g of solid carbon dioxide at 1.00 atm pressure are reversibly converted to vapour at 
1 atm pressure and −78 °C, 25.33 kJ of heat are absorbed by the system. The density of solid 
CO2 is 1.56 g cm−3
. 
 3. ∆H for this process is (in kJ): 
 (1) −23.71 (2) +23.71 (3) −25.33 (4) +25.33 (5) +26.95

anonymous · Answer

4. ∆S for the process is (in J K−1): 
 (1) 130.0 (2) −130.0 (3) 121.5 (4) −121.5 (5) 138.1 
 5. ∆G for the process is (in kJ): 
 (1) 50.66 (2) −50.66 (3) −46.71 (4) 46.71 (5) 0