Question

Calculate ΔH if a piece of aluminum with a specific heat of 0.9 kJ-kg^-1-K^-1 and a mass of 1.6 kg is heated from 286°K to 299°K.

(a) 16.52 kJ

(b) 17.72 kJ

(c) 18.72 kJ

(d) 15.52 kJ

The question was asked in an interview for job.

My query is from Enthalpy Change Due to Reaction in section Energy Balance of Bioprocess Engineering

Answer 1

Correct answer is (c) 18.72 kJ

Explanation: ΔH = q = cpsp × m × (ΔT) = (0.9) × (1.6) × (13) = 18.72 kJ.