# Chemistry (11th)

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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 - ?

• Chemistry (11th) -

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

Exothermic reactions deltaH is negative.

• Chemistry (11th) -

Thanks for the help.

So in endothermic reaction deltaH is positive ?

• Chemistry (11th) -

yes,positive.

• Chemistry (11th) -

thnx

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