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MHT CET Chemistry question

ChemistryThermodynamicsMHT CET

The heat produced during combustion of 7.8 g at constant volume forming and is 40 kJ at 27 °C. The heat of combustion at constant pressure is

Answer: (D)

Solution

7.8 g = 0.1 mol, so = -400 kJ ; C6H6(l) + 7.5 O2 -> 6CO2 + 3H2O(l) has = -1.5, so = -400

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Question ID VK-064476