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JEE Main Chemistry question

ChemistryThermodynamicsJEE Main

In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess oxygen at 298.0 K. The temperature of the calorimeter was found to increase from 298.0 K to 298.45 K. Given that the heat capacity of the calorimeter is 2.5 , the numerical value for the enthalpy of combustion of the gas in is

Answer: (B)

Solution

Moles of gas . Heat released $=C×Δ

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Question ID VK-134785