Consider a hypothetical chemical reaction:

A+B+C+D

(In this equation A, B, C and D stand for some unknown chemical formulas.)

Here is an energy diagram for the reaction:

energy

(kJ/mol)

400.

300+

200-

100+

reaction coordinate

Use the energy diagram to answer these questions.

What is the heat of reaction?

Is the reaction exothermic or endothermic?

Can you determine the activation energy?

Can you determine the activation energy of the reverse reaction?

C+D+A+B

kJ/mol

O Exothermic

O Endothermic

O Neither

O Yes, it's kJ/mol

O No.

O Yes, it's kJ/mol

O No.

X

G

H

ola

Ar