Following enthalpy changes are given: α−Dglucose(s)→α−Dglucose(aq);ΔH=10.72kJ β−Dglucose(s)→β−Dglucose(aq);ΔH=4.68kJ α−Dglucose(s)→β−Dglucose(aq);ΔH=1.16kJ Calculate enthalpy change in α−Dglucose(s)→β−Dglucose(s)
A
14.24kJ
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B
16.56kJ
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C
−7.2kJ
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D
4.88kJ
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Solution
The correct option is D4.88kJ α−Dglucose(s)→α−Dglucose(aq);ΔH=10.72kJ β−Dglucose(s)→β−Dglucose(aq);ΔH=4.68kJ α−Dglucose(s)→β−Dglucose(aq);ΔH=1.16kJ It can be seen that, (i)−(ii)−(iii)= α−Dglucose(s)→β−Dglucose(s)ΔH=10.72kJ−4.68−1.16=4.88kJ