MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryThermodynamics and ThermochemistryRelationship Between ΔH and ΔU
When 0.5 g of sulphur is burnt to SO₂ 4.6 kJ of heat is liberated. What is the enthalpy of formation of sulphurdioxide?
A.–147.2 kJ
B.+147.2 kJ
C.+294.4 kJ
D.–294.4 kJ✓ Correct
Explanation
2 2 g S O SO → Mass 0.5 n M.W. 32 ∴ For 0.5 32 moles, H 4.6kJ ∴ For 1 mole, f 4.6 32 H 294.4kJ 0.5 x
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