pacity of 2.44 joules per gram kelvin and a specific gravity of 0.7893. Assume the initial temperature of the ethanol is 70 degrees Fahrenheit, the heater is powered by a voltage of 240 volts at a current of 500 milliamperes, and the transfer of energy to the ethanol as heat has an efficiency of 45%. How long must the heater operate to raise the temperature of the ethanol to 95 degrees Fahrenheit? Express your answer in units of

pacity of 2.44 joules per gram kelvin and a specific gravity of 0.7893. Assume the initial temperature of the ethanol is 70 degrees Fahrenheit, the heater is powered by a voltage of 240 volts at a current of 500 milliamperes, and the transfer of energy to the ethanol as heat has an efficiency of 45%. How long must the heater operate to raise the temperature of the ethanol to 95 degrees Fahrenheit? Express your answer in units of

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 27P: An engine absorbs three times as much heat as it discharges. The work done by the engine per cycle...

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Question

A heater is placed in 5 liters of ethanol, which has a specific heat capacity of 2.44 joules per gram kelvin and a specific gravity of 0.7893.

Assume the initial temperature of the ethanol is 70 degrees Fahrenheit, the heater is powered by a voltage of 240 volts at a current of 500 milliamperes, and the transfer of energy to the ethanol as heat has an efficiency of 45%.

How long must the heater operate to raise the temperature of the ethanol to 95 degrees Fahrenheit? Express your answer in units of minutes.

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