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One gram of an organic liquid X ( molecu...

One gram of an organic liquid `X (` molecular mass 78) liberates `160J` of heat on solidification. `DeltaH_(fusion)(X)` is `:`

A

`19.2 kJ//mol`

B

`12.48 kJ//mol`

C

`124.8 kJ//mol`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH = ("Heat released")/("mole")`
`78g "of" x to 1 "mole"`
`1g "of" x to 1/(78) = 0.0128 "mole"`
`DeltaH_("fusion") = (160)/(1000 xx 0.0128) = 12.48 kJ//mol`.
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