-262 kJ mol-1
-42 kJ mol-1
+42 kJ mol-1
+262 kJ mol-1
Correct answer is B
CO + H2O → CO2 + H2 DH = 394 kJ mol-1
-242 + 110 = -352 kJ mol-1
35 = -394 -(352)
= -394 + 352
= -42 kJ mol-1
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