Answer to Question #136645 in General Chemistry for Audra

Question

Calculate ΔH°rxn (in kJ/mol) for the reaction

2C --> D

given the following information:

D --> 2A + 2B ΔH°rxn = 130 kJ/mol

C --> A + B ΔH°rxn = 230 kJ/mol

Answer 1

given the following information:

D --> 2A + 2B ΔH°rxn = 130 kJ/mol --------------------------- 1 .

C --> A + B ΔH°rxn = 230 kJ/mol --------------------------------2 .

To Calculate ΔH°rxn (in kJ/mol) for the reaction

2C --> D .

For Above Reaction ΔH°rxn (in kJ/mol)

= eqn 2 * 2 - eqn 1 .

= 2* 230 - 1* 130

= 330 kj / mol . Answer .