How do i solve this? no units needed

Question

When a sample of 95.01 g NH₄NO₃ dissolves in 56.26 g of water, the temperature changes from 27.33 C to 7.85 C. Calculate the heat flow (Q) with respect to the water in calories. (write answer to hundredths place)

Answer 1

Hello, Emma,

Since the temperature of the water drops, heat has been removed from the water. We can calculate how much heat by using the specific heat of water: 4.184J/gK

Heat = (4.184J/gK)*(95.01 grams)*(-19.48K)

Heat = =7743.7 J

The negative sign means that the heat has left the water, indicated that the dissolution of the ammonium nitrate is endothermic.

Bob