Chapter 3, Problem 56E

Interpretation Introduction

Interpretation:

The units of energy in $\text{J}$, $\text{cal}$, $\text{Cal}$ and $\text{kWh}$ are to be determined.

Concept introduction:

There are several units of energy. Joule is the SI unit of energy.

Joule, calorie, Cal and kilowatt hour are the units of energy.

The energy conversion factors are listed below:

$\text{1}\text{cal}\text{(calorie)}$	$=$	$4.184\text{J}$
$1\text{J}$	$=$	$\text{0}\text{.239}\text{cal}\text{(calorie)}$
$\text{1}\text{Cal}\text{(Calorie)}$	$=$	$\text{1000}\text{calories}$
$1\text{ Cal}$	$=$	$\text{4}\text{.184}\times {\text{10}}^3\text{}\text{ J}$
$\text{1 kWh}$	$=$	$\text{3}{\text{.60×10}}^{\text{6}}\text{J}$