
Interpretation:
The amount required (in grams) of each of given items to produce
Concept introduction:
The power generated by utilizing chemical or physical resources for providing heat and light or for carrying out various processes, is known as energy. The SI unit of energy is joule.
Unit conversion is defined as the process in which multiple steps are used to convert the unit of measurement for the same given quantity. It is determined by multiplication with a conversion factor.
The fraction in which numerator and denominator are the same quantities but are determined in different units, is known as a conversion factor.

Answer to Problem 42E
Solution:
Explanation of Solution
a) Pine wood
The combustion of pinewood produces heat energy. The energy produced during combustion is
The heat of combustion for pinewood is
The amount used to produce
Therefore, the quantity of pinewood used to produce
b) Octane
The combustion of octane produces heat energy. The energy produced during combustion is
The heat of combustion for octane is
The amount used to produce
Therefore, the quantity of octane used to produce
c) Ethanol
The combustion of ethanol produces energy. The energy produced during combustion is
The heat of combustion for ethanol is
The amount used to produce
Therefore, the quantity of ethanol used to produce
d) Coal
The combustion of coal produces heat energy. The energy produced during combustion of coal is
The heat of combustion for coal is
The amount used to produce
Therefore, the quantity of coal used to produce
e) Natural gas
The combustion of natural gas produces heat energy. The energy produced during combustion is
The heat of combustion for natural gas is
The amount used to produce
Therefore, the quantity of natural gas used to produce
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Chapter 9 Solutions
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