Calculate the temp change.

Question

An 9.0 g ice cube is placed into 245 g of water.

Calculate the temperature change in the water upon the complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and then use q=mC-T to calculate the temperature change of the 245 g of water.

Answer 1

To melt 0.9 g of ice requires us to know the ∆Hfusion, which is 334 J/g

334 J / g x 0.9 g = 300.6 J needed to melt the ice

q = mC∆T

300.6 J = (245 g)(4.184 J/gº)(∆T)

∆T = 300.6 J / (245 g)(4.184 J/gº)

∆T = 0.29º