Question

how does applying heat impact of exothermic reactions? why does cause a net backwards reaction?

Answer 1

if you've studied equilibrium, you can consider the addition of heat to an exothermic reaction a stress to the products, so the reaction shifts backwards

Answer 2

a stress to the products? can u please explain that?

Answer 3

have you studied equilibrium? that's how i usually teach this kind of situation

Answer 4

yes i have :)

Answer 5

then you know about stresses to systems at equilibrium? leChatelier's principle?

Answer 6

i know lechatelier's principle: things acting opposite... but stresses im not too sure?

Answer 7

things "act opposite" when reactions are stressed. A stress is something like the addition of a product, or the removal of a reactant, that changes the concentrations at equilibrium and "unbalances" the system. The system will then shift to relieve the stress

Answer 8

can u please explain how heat impacts this?

Answer 9

i know that an increased temp will causeless products in exo thermic how? if i apply that acting in opposite thing, how does it apply with this example?

Answer 10

heat can be considered just like a reactant or a product in a reaction, so if you add heat to an exothermic reaction, it's just like adding too much of a product. So the reaction shifts backwards

Answer 11

increasing temp is adding het to product rather than reactant?

Answer 12

if the reaction is exothermic, heat is produced, right?

Answer 13

\[CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O + energy\]