If you were to start with a 1-gallon pot of water having a temperature of 10*C and boil it away completely on a stove, it would take a considerable amount of time. Large amounts of energy from the burner would have to be conducted into the pot of water to bring it up to its boiling temperature (100*C), and even more energy would be required to convert it to a gas. If you could take all the vaporized water that you boiled away and instantly condensed it back into the pot, it would release enough energy to blow your house off its foundation. Do the calculation to prove that statement is true. How much energy (measure in sticks of dynamite) is needed to completely boil away 1 gallon of water? This is the same amount of energy that would be released if the water vapor condensed back into the pot.1 gallon of water = 3780gAmount of water to raise 1g of water 1*C = 4.186 J/gEnergy required to vaporize 1g of liquid water at 100*C = 2260J/gStarting temp. of water = 10*CEnergy in a stick of dynamite = 2.1 x 10^6 J

To calculate the energy needed to completely boil away 1 gallon of water and compare it to the…

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College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter14: Heat And Heat Transfer Methods

Section: Chapter Questions

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If you were to start with a 1-gallon pot of water having a temperature of 10*C and boil it away completely on a stove, it would take a considerable amount of time. Large amounts of energy from the burner would have to be conducted into the pot of water to bring it up to its boiling temperature (100*C), and even more energy would be required to convert it to a gas. If you could take all the vaporized water that you boiled away and instantly condensed it back into the pot, it would release enough energy to blow your house off its foundation. Do the calculation to prove that statement is true. How much energy (measure in sticks of dynamite) is needed to completely boil away 1 gallon of water? This is the same amount of energy that would be released if the water vapor condensed back into the pot.

1 gallon of water = 3780g

Amount of water to raise 1g of water 1*C = 4.186 J/g

Energy required to vaporize 1g of liquid water at 100*C = 2260J/g

Starting temp. of water = 10*C

Energy in a stick of dynamite = 2.1 x 10^6 J

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