Question

Chapter 17 Thermochemistry Final Review Determine the heat required to convert 62.0 grams of ice at -10.3 °C to water at 0.0 °C. The specific heat capacity of ice is 2.02 J/g °C 1. 2. Determine the energy released when converting 500.0 g of steam at 100.0 °C to ice at-250°C. Determine the final temperature when 450.2 grams of aluminum at 95.2 °C is placed in an insulated calorimeter with 60.0 grams of water at 10.0 °C. 3. 4. Determine the mass of iron heated to 85.0 °C to add to 54.0 grams of ice to produce water at 12.5 °C. The specific heat of iron is 0.045 J/g °C.

Answer 1

) Step1: Conversion ofice from -10.3°C to 0°C Mass of ice 62.0.g Heat capcity of ice, s - 2.02 Amount of heat required, qi - msAT 620g x 2.02 g°C-X(00°C-(-103°C)) 1290 Jx.9 J 1 kJ Step2: Conversion ofice from 0°C to 0°O Mass of ice - 62.0 g Heat of fusion of ice -334 Jlg Amount of heat required, q,-62.0 g 334 J 1 kJ 20708 Jx20.708 kJ Total amount of heat absorbed by ice , q- +q2 1.29 kJ20.708 kJ 21.998 kJ - 22.0 kJ