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# A 45-kg sample of water absorbs 345 kJ of heat. If the

ISBN: 9780321910295 34

## Solution for problem 82P Chapter 3

Introductory Chemistry | 5th Edition

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Problem 82P

A 45-kg sample of water absorbs 345 kJ of heat. If the water was initially at 22.1 °C, what is its final temperature?

Step-by-Step Solution:
Step 1 of 2

Problem 82P :

Given :

Sample of amount of water = 45 kg

Heat absorbed = 345 kJ

Initial temperature of water = 22.1 °C.

Final temperature  = ?

To calculate the final temperature, we need specific heat of water :

The Specific Heat of Iron = 4.186 J/g/°C (K).

Now, let’s calculate the change in temperature () :

Q(Amount of heat) = m (mass) C(Specific heat)   (Temperature change)

345 kJ = 45 kg  4.186 J/g/°C

345 kJ  = 188.37

=

= 1.83°C

Step 2 of 2

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