World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN: 9781133109655
Author: Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher: Brooks / Cole / Cengage Learning
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Chapter 10, Problem 24A
Interpretation Introduction

Interpretation: Required heat to raise the temperature of the same sample of metal from 25°C to 40°C needs to be determined.

Concept Introduction: The expression for heat is as follows:

  Q=s×m×ΔT

Here, Q represent energy required, s denotes specific heat capacity, m represent mass of the sample in grams and ΔT represent change in temperature.

Expert Solution & Answer
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Answer to Problem 24A

Required heat is 25.2kJ .

Explanation of Solution

The sample has the same mass in both cases.

Calculate temperature change for 1st case as follows:

  ΔT1=20°C15°C=5°C

Calculate temperature change for 2nd case as follows:

  ΔT1=40°C25°C=15°C

Hence,

  Q1=s×m×ΔT1 …… (1)

and Q2=s×m×ΔT2 …… (2)

Divide equation (1) by (2).

  Q1Q2=s×m×ΔT1s×m×ΔT2

  Q1Q2=ΔT1ΔT2 …… (3)

Given values are as follows:

  Q1=8.40kJΔT1=5.0°CΔT2=15.0°CQ2=?

Substitute all values in equation (3).

  Q1Q2=ΔT1ΔT2Q2=ΔT2×Q1ΔT1=15°C×8.40kJ5°C=1265kJ

  Q2=25.2kJ

Therefore, required heat is 25.2kJ .

Chapter 10 Solutions

World of Chemistry, 3rd edition

Ch. 10.2 - Prob. 4RQCh. 10.2 - Prob. 5RQCh. 10.2 - Prob. 6RQCh. 10.3 - Prob. 1RQCh. 10.3 - Prob. 2RQCh. 10.3 - Prob. 3RQCh. 10.3 - Prob. 4RQCh. 10.3 - Prob. 5RQCh. 10.4 - Prob. 1RQCh. 10.4 - Prob. 2RQCh. 10.4 - Prob. 3RQCh. 10.4 - Prob. 4RQCh. 10.4 - Prob. 5RQCh. 10.4 - Prob. 6RQCh. 10.4 - Prob. 7RQCh. 10 - Prob. 1ACh. 10 - Prob. 2ACh. 10 - Prob. 3ACh. 10 - Prob. 4ACh. 10 - Prob. 5ACh. 10 - Prob. 6ACh. 10 - Prob. 7ACh. 10 - Prob. 8ACh. 10 - Prob. 9ACh. 10 - Prob. 10ACh. 10 - Prob. 11ACh. 10 - Prob. 12ACh. 10 - Prob. 13ACh. 10 - Prob. 14ACh. 10 - Prob. 15ACh. 10 - Prob. 16ACh. 10 - Prob. 17ACh. 10 - Prob. 18ACh. 10 - Prob. 19ACh. 10 - Prob. 20ACh. 10 - Prob. 21ACh. 10 - Prob. 22ACh. 10 - Prob. 23ACh. 10 - Prob. 24ACh. 10 - Prob. 25ACh. 10 - Prob. 26ACh. 10 - Prob. 27ACh. 10 - Prob. 28ACh. 10 - Prob. 29ACh. 10 - Prob. 30ACh. 10 - Prob. 31ACh. 10 - Prob. 32ACh. 10 - Prob. 33ACh. 10 - Prob. 34ACh. 10 - Prob. 35ACh. 10 - Prob. 36ACh. 10 - Prob. 37ACh. 10 - Prob. 38ACh. 10 - Prob. 39ACh. 10 - Prob. 40ACh. 10 - Prob. 41ACh. 10 - Prob. 42ACh. 10 - Prob. 43ACh. 10 - Prob. 44ACh. 10 - Prob. 45ACh. 10 - Prob. 46ACh. 10 - Prob. 47ACh. 10 - Prob. 48ACh. 10 - Prob. 49ACh. 10 - Prob. 50ACh. 10 - Prob. 51ACh. 10 - Prob. 52ACh. 10 - Prob. 53ACh. 10 - Prob. 54ACh. 10 - Prob. 55ACh. 10 - Prob. 56ACh. 10 - Prob. 57ACh. 10 - Prob. 58ACh. 10 - Prob. 59ACh. 10 - Prob. 60ACh. 10 - Prob. 61ACh. 10 - Prob. 62ACh. 10 - Prob. 63ACh. 10 - Prob. 64ACh. 10 - Prob. 65ACh. 10 - Prob. 66ACh. 10 - Prob. 67ACh. 10 - Prob. 68ACh. 10 - Prob. 1STPCh. 10 - Prob. 2STPCh. 10 - Prob. 3STPCh. 10 - Prob. 4STPCh. 10 - Prob. 5STPCh. 10 - Prob. 6STPCh. 10 - Prob. 7STPCh. 10 - Prob. 8STPCh. 10 - Prob. 9STPCh. 10 - Prob. 10STPCh. 10 - Prob. 11STP
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