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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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The “Chemistry in Focus” segment Nature Has Hot Plants discusses thermogenic, or heat-producing, plants. For some plants, enough heat is generated to increase the temperature of the blossom by 15 °C. About how much heat is required to increase the temperature of 1 L of water by 15 °C?

Interpretation Introduction

Interpretation:

The amount of heat required to increase the temperature of 1 L of water by 15° C should be calculated.

Concept Introduction:

4.184 J of heat is needed to change the temperature of each gram of water by 1 °C and it is specific heat of water.

Thus, formula used for calculate energy in joules is Q=mcΔT

Where, Q = heat

m = mass of water

c = specific heat capacity of water ( 4.184 Jg°C )

ΔT = change in temperature.

Explanation

Density of water = 1g/cm3

Volume of water = 1 L

Convert L into cm3

1 L = 1000 cm3

Thus, volume of water = 1000 cm3

Mass of water = Volume×Density

= 1000 cm3×1 g/cm3 = 1000 g

ΔT

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