It should be determined that the energy in kilo joules used to power a 100 w a t t light bulb continuously over an 24 hour period and the quantity of coal would have to be burned to provide this quantity of energy. Concept introduction: Enthalpy of combustion is the energy released by a combustion reaction between hydrocarbons, oxygen and heat source. Enthalpy of formation is the heat released or absorbed in a chemical reaction at constant temperature when simple substances combine into a more complex substance. 1 watt = 1 J/s 1 kwh = 3600 kJ 1 k W h is the quantity of energy transferred when 1000 w a t t is dispensed over a 1.0 h o u r p e r i o d

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Chapter 20, Problem 24PS

Interpretation Introduction

Interpretation:

It should be determined that the energy in kilo joules used to power a 100 watt light bulb continuously over an 24 hour period and the quantity of coal would have to be burned to provide this quantity of energy.

Concept introduction:

Enthalpy of combustion is the energy released by a combustion reaction between hydrocarbons, oxygen and heat source.

Enthalpy of formation is the heat released or absorbed in a chemical reaction at constant temperature when simple substances combine into a more complex substance.

1 watt = 1 J/s1 kwh = 3600 kJ

1 kWh is the quantity of energy transferred when 1000 watt is dispensed over a 1.0 hour period

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