Determine the entropy change when 1.80 mol of HBr (g) condenses at atmospheric pressure?

Question

Chemistry

Romeo Acevedo

24 February, 08:56

Determine the entropy change when 1.80 mol of HBr (g) condenses at atmospheric pressure?

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Reid · Answer 1

Hvap, Tvap, Mr are constants

Hvap = 443.38 kJ/kg = 196417.34 J/mol

Tvap = - 85.1 °C

Mr = 36.5 g/mol

n = 1.80 mol

ΔS = n*Hvap/Tvap

ΔS = 1.80 * 196417.34 / (273-85.1)

ΔS = 1881.59 J/K = 1.882 kJ/K