Answered: A) a typical home water heater contains…

A) a typical home water heater contains 40 gallons of water. How much heat (in kJ) is required to heat the 40 gallons of water (1 gallon=3.78 liters from room temperature 68F to 122F

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 26RQ: How many Btu of heat can be produced by 4 kWh ofelectricity?

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Question

A) a typical home water heater contains 40 gallons of water. How much heat (in kJ) is required to heat the 40 gallons of water (1 gallon=3.78 liters from room temperature 68F to 122F

b) If the water is heated by combustion of natural gas (CH4) with oxygen to produce carbon dioxide and steam, how many moles of natural gas must be burned to heat the water in the water heater? (First write the balanced chemical reaction and calculate the delta H of the reaction.

c) Would a furnace burning natural gas be more efficient if the water produced was liquid instead of steam? Why?

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