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 - ?

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

Exothermic reactions deltaH is negative.

Thanks for the help.

So in endothermic reaction deltaH is positive ?

yes,positive.

thnx

1) The temperature of the water will go up. When a reaction occurs in water and heat is given off, it means that the reaction is exothermic. This means that energy is being released to the surroundings, in this case, the water. As a result, the temperature of the water will increase.

2) The sign for delta H (ΔH) will be negative (-). In an exothermic reaction, where heat is given off, the value of ΔH is negative because energy is being released from the system.