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JEE Main 2022 Chemistry question

ChemistryThermodynamicsJEE Main 2022

2.4 g coal is burnt in a bomb calorimeter in excess of oxygen at 298 K and 1 atm pressure. The temperature of the calorimeter rises from 298 K to 300 K. The enthalpy change during the combustion of coal is −x kJ . The value of x is . (Nearest integer) (Given : Heat capacity of bomb calorimeter is 20.0 kJ . Assume coal to be pure carbon)

Answer: 200

Solution

The heat evolved is kJ, for 2.4/12 = 0.2 mol

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Question ID VK-025157