If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/

Question

If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) ↔ C₃H₈(g) will be __________ Kcal.

Options:

A . -19.4

B . -30.2

C . 55.2

D . -55.2

Answer: Option A
Answer: (a).-19.4

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