The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
Correct answer: A. 2300 J
- A. 2300 J
- B. 4600 J
- C. 230 J
- D. 2.3 x 10^6 J
Explanation
The heat removed is nCpΔT = 1 × 23 × (400 − 300) = 2300 J. Cooling releases this amount, so the magnitude of heat released is 2300 J.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Engineering Thermodynamics
598 free Chemical Engineering Thermodynamics MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Engineering Thermodynamics questions
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?
The critical pressure at which the latent heat of vaporization of steam becomes zero is _____________ Kg/cm2 ?
In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is______________________?
Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be_________________?
Air standard Otto cycle is more efficient than the diesel cycle for the same__________________?
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ?