STANDARDChemistry-Thermodynamics
STANDARD Chemistry Heat Capacity MCQ Question
Type: MCQ-numerical-Medium-Class 11
The molar heat capacity of water at constant pressure, Cₚ is 75 J K⁻¹ mol⁻¹. When 10 kJ of heat is supplied to 1 kg water which is free to expand, the increase in temperature of water is
A
2.4 K
B
4.8 K
C
3.2 K
D
10 K
Correct Answer
Option A
Detailed Explanation
The heat supplied is qₚ = 10 kJ = 10000 J. The number of moles of water is n = 1000/18 = 55.5 mol. Using the formula ΔT = qₚ / (nCₚ), we get ΔT = 10000 / (55.5 × 75) = 2.4 K.
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