Question on: JAMB Chemistry - 1997
2SO2(g) + O2(g) 2SO3. In the reaction above, the standard heats of formation of SO2(g) and SO3(g) are -297 KJ mol-1 respectively. The heat change of the reaction is?
A
-99 kJ mol-
B
-198 kJ mol-
C
+198 kJ mol-
D
+683kJ mol-
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Correct Option: B
2SO2 + O2 → 2SO3
2(-297) 2(-396)
-594 -792
Heat change = heat of product - reactants = -792 - (-594) = 198kj mol-
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