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Question:

For silver, C_p(JK⁻¹mol⁻¹)=23+0.01T. If the temperature (T) of 3 moles of silver is raised from 300K to 1000K at 1 atm pressure, the value of ΔH will be close to:

62 kJ

21 kJ

16 kJ

13 kJ

Solution:

Correct option is D. 62 kJ
Solution:- (D) 62 kJ
ΔH = n∫(T₁)^(T₂) C_p.m dT = 3 × ∫(300)^(1000) (23+0.01T)dT = 3[23(1000-300)+0.01/2(1000²-300²)] = 61950J ≈ 62kJ