05-09-2018, 03:44 PM

Q2. From the data below calculate H at 25 °C and 65 °C for the reaction.

H2 (g) + Br2 (g) → 2 HBr (g)

Compound Hf / kJ mol-1 Cp / J K-1 mol-1

H2 (g) 0.0 28.8

Br2 (g) 30.9 36.0

HBr (g) -36.3 29.1

I am able to calculate delta H for a given temperature, but normally when this question is presented I am given two Cp/ JK^-1 mol^-1 rows. Is it possible to answer this question for two different temperatures when only given one row of data for Cp/ JK^-1 mol^-1?

H2 (g) + Br2 (g) → 2 HBr (g)

Compound Hf / kJ mol-1 Cp / J K-1 mol-1

H2 (g) 0.0 28.8

Br2 (g) 30.9 36.0

HBr (g) -36.3 29.1

I am able to calculate delta H for a given temperature, but normally when this question is presented I am given two Cp/ JK^-1 mol^-1 rows. Is it possible to answer this question for two different temperatures when only given one row of data for Cp/ JK^-1 mol^-1?