   Chapter 10, Problem 25QAP ### Introductory Chemistry: A Foundati...

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

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
249 views

# Convert the following numbers of calories or kilocalories into joules and kilojoules (Remember: kilo means 1000.) 75.2 kcal 75.2 cal i> cal 1.41 kcal

Interpretation Introduction

(a)

Interpretation:

Convert 75.2 kcal to joules and kilojoules.

Concept Introduction:

A conversion factor is a numerical ratio which is used to show a measurement in one unit as another unit. It is always equal to 1.

Explanation

The given conversion is: conversion of kilocalories to joules and kilojoules.

1 kilocalorie is equal to the 4184 joules and 4.184 kilojoules.

1 kcal = 4184 J and 1 kcal = 4.184 kJ

Thus, conversion factor is given by:

4184 J1 kcal and4.184 kJ1 kcal

So,

75.2 kcal

=4

Interpretation Introduction

(b)

Interpretation:

Convert 75.2 cal to joules and kilojoules.

Concept Introduction:

A conversion factor is a numerical ratio which is used to show a measurement in one unit as another unit. It is always equal to 1.

Interpretation Introduction

(c)

Interpretation:

Convert 1.41×103 cal to joules and kilojoules.

Concept Introduction:

A conversion factor is a numerical ratio which is used to show a measurement in one unit as another unit. It is always equal to 1.

Interpretation Introduction

(d)

Interpretation:

Convert 1.41×103 kcal to joules and kilojoules.

Concept Introduction:

A conversion factor is a numerical ratio which is used to show a measurement in one unit as another unit. It is always equal to 1.

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