ThermochemistryHard

Question

Based on the following thermochemical equations,

H2O(g) + C(s) → CO(g) + H2(g): ΔH = 131 kJ

CO(g) + ½ O2(g) → CO2(g): ΔH = −282 kJ

H2(g) + ½ O2(g) → H2O(g): ΔH = −242 kJ

C(s) + O2(g) → CO2(g): ΔH = X kJ

The value of ‘X’ will be

Options

A.−393 kJ
B.−655 kJ
C.+393 kJ
D.+655 kJ

Solution

Adding all the given T.C.E.: X = –393

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