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It is observed that on combustion of 4.2...

It is observed that on combustion of 4.2 g of gaseous propene in a closed rigid vessel 49 kcal of heat was liberated at 300 K. What could be a possible value of `abs(DeltaH^(@) "combustion")` of gaseous cyclone propane[Take : R=2 cal`//`K mole]?

A

490 kcal

B

491.5 kcal

C

49 kcal

D

500 kcal

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The correct Answer is:
D
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