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When 5 g of sulphur is burnt to SO(2), 4...

When 5 g of sulphur is burnt to `SO_(2)`, 46 kJ of heat is liberated. What is the enthalpy of formation of sulphur dioxide?

A

`-147.2 kJ`

B

`+147.2 kJ`

C

`+294.4 kJ`

D

`-294.4 kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
Heat liberated by burning 5 g of S = 46 kJ
Heat liberated by burning 32 g of S
` = (46 xx 32)/(5) kJ = 294.4 kJ`
`therefore` Enthalpy of formation of `SO_(2) = -294.4 kJ "mol"^(-1)`.
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MODERN PUBLICATION-THERMODYNAMICS-Competition File MCQ
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