1.

When 0.5g of sulphur is burnt to SO_(2), 4, 6 kJ of heat is liberated. What is the enthalpy of formation of sulphur dioxide

Answer»

`+ 147.2 kJ`
`- 147.2 kJ`
`- 294.4 kJ`
`+ 294.4 kJ`

Solution :`S+O_(2)rarrSO_(2), DeltaH_(F)=-4.6 kJ`
`because` 0.5 GM of sulphur on burning produce 1 gm of `SO_(2)`
`THEREFORE` 32 gm of sulphur on burning produce 64 gm of `SO_(2)`
`therefore DeltaH=(-4.6 kJ)xx64=-294.4 kJ`


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