# A 1,200 watt heater is used for raising the temperature of 1 liter of water to its boiling point....

## Question:

A 1,200 watt heater is used for raising the temperature of 1 liter of water to its boiling point. How long will it take for the water to boil if the initial temperature of the water is 20°C? (Hint: The specific heat capacity of water is 1 cal /g.°C or 4.19 J /g.°C)

## Electric Power:

Electric power is the amount of electrical energy transferred per unit of time measured in watts, where 1 watt = 1 joule (J)/ second (s). In an electric water heater, electrical energy is converted to heat energy. The heat required to raise the temperature of a given amount of water can be calculated using its specific heat capacity. If the power of a heater is known, then the time taken by the heater to heat a given amount of water to a specified temperature can be calculated.

## Answer and Explanation:

The volume of water is 1 L = 1000 mL. Since the density of water is 1g/mL, the mass of water is: {eq}m = (volume)\times (density) = (1000\ mL)\times...

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from CLEP Natural Sciences: Study Guide & Test Prep

Chapter 6 / Lesson 11