76. Calculate the amount of heat required to raise the tem- perature of a 22-g sample of water from 7 °C to 18 °C. 78. Calculate the amount of heat required to heat a 3.5-kg gold bar from 21 °C to 67 °C. 80. If 57 J of heat are added to an aluminum can with a mass of 17.1 g, what is its temperature change? 82. A 45-kg sample of water absorbs 345 kJ of heat. If the water was initially at 22.1 °C, what is its final temperature?

76. Calculate the amount of heat required to raise the tem- perature of a 22-g sample of water from 7 °C to 18 °C. 78. Calculate the amount of heat required to heat a 3.5-kg gold bar from 21 °C to 67 °C. 80. If 57 J of heat are added to an aluminum can with a mass of 17.1 g, what is its temperature change? 82. A 45-kg sample of water absorbs 345 kJ of heat. If the water was initially at 22.1 °C, what is its final temperature?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.12P

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