Question

For reaction 3A + 2B ? A3B2 ?rH° = 58.1 kJ/(mol rxn) "A" molar mass = 28.7 g/mol; "B" molar mass= 101.7 g/mol what is the enthalpy change in kJ if 50 g of A react with 50 g of B?

          For reaction 3A + 2B ? A3B2

?rH° = 58.1 kJ/(mol
rxn)

"A" molar mass = 28.7 g/mol; "B" molar mass= 101.7 g/mol

what is the enthalpy change in kJ if 50 g of A react with 50 g of B?

Added by Joanna G.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Ronald Prasad

01/20/2022

Step 1

For A: \[ \text{Moles of A} = \frac{\text{mass of A}}{\text{molar mass of A}} = \frac{50 \text{ g}}{28.7 \text{ g/mol}} \approx 1.742 \text{ mol} \] For B: \[ \text{Moles of B} = \frac{\text{mass of B}}{\text{molar mass of B}} = \frac{50 \text{ g}}{101.7 \text{ Show more…

Show all steps

Thanks for your feedback!

For reaction 3A + 2B → A3B2 ΔrH° = 58.1 kJ/(mol rxn) "A" molar mass = 28.7 g/mol; "B" molar mass = 101.7 g/mol what is the enthalpy change in kJ if 50 g of A react with 50 g of B?