Question Detail

CHM 101 Thermochemistry II Objective Question

Question

If 2H₂(g) + O₂(g) → 2H₂O(l) has ΔH = -572 kJ, what is ΔH for H₂(g) + ½O₂(g) → H₂O(l)?
Options
A -572 kJ
B +572 kJ
C -286 kJ
Correct Answer
D +286 kJ
Correct Answer

Option C is the correct answer.

Detailed Explanation

The second equation is half of the first, so ΔH = -572 kJ × ½ = -286 kJ.

Hint

The notes provide this calculation.

Question Info