18. Which of the following processes is endothermic? (A) O2(g) + 2H2(g) → 2H2O(g) (B) H2O(g) → H2O(l) (C) 3O2(g) + 2CH3OH(g) → 2CO2(g) + 2H2O(g) (D) H2O(s) → H2O(l)

24. Which of the following processes always results in an increase in the energy of a system? (A) The system loses heat and does work on the surroundings. (B) The system gains heat and does work on the surroundings (C) The system loses heat and has work done on it by the surroundings. (D) The system gains heat and has work done on it by the surroundings.

18. Which of the following processes is endothermic?
(A) O₂(g) + 2H₂(g) → 2H₂O(g)
(B) H₂O(g) → H₂O(l)
(C) 3O₂(g) + 2CH₃OH(g) → 2CO₂(g) + 2H₂O(g)
(D) H₂O(s) → H₂O(l)

相關試題

相關試卷

18. Which of the following processes is endothermic?(A) O2(g) + 2H2(g) → 2H2O(g)(B) H2O(g) → H2O(l)(C) 3O2(g) + 2CH3OH(g) → 2CO2(g) + 2H2O(g)(D) H2O(s) → H2O(l)

相關試題

相關試卷

18. Which of the following processes is endothermic?
(A) O₂(g) + 2H₂(g) → 2H₂O(g)
(B) H₂O(g) → H₂O(l)
(C) 3O₂(g) + 2CH₃OH(g) → 2CO₂(g) + 2H₂O(g)
(D) H₂O(s) → H₂O(l)