2007 Exam 1

[sandi]

Written Exam 1, 2007, Q14

How could you possibly tell whether the reaction was endothermic or exothermic, were you supposed to know this.

[joseph95]

Experiment 2 has a higher initial rate of reaction, indicating that the temperature is higher (as an increase in temperature increases rate of reaction).
As the temperature is higher, and the concentration of the products is lower, than Experiment 1, the reaction must be exothermic.