Question

When A + B --> C then this reaction occurs in water, heat is given off.

1) Will the temperature of water go up or go down ?

- is the asnwer down ? since the energy is released to the surrounding.

2) What is the sign for delta H ?
+ or - ?

Answer 1

if the reaction gives off heat, the water must absorb it: temp goes up.

Exothermic reactions deltaH is negative.

Answer 2

Thanks for the help.

So in endothermic reaction deltaH is positive ?

Answer 3

yes,positive.

Answer 4

thnx