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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.

A. -19.4

B. -30.2

C. 55.2

D. -55.2

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Correct Answer :

A. -19.4


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