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Introductory Chemistry: A Foundati...

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

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Section
BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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Convert the following numbers of calories or kilocalories into joules and kilojoules (Remember: kilo means 1000.)

  1. 75.2 kcal
  2. 75.2 cal

i>Chapter 10, Problem 25QAP, Convert the following numbers of calories or kilocalories into joules and kilojoules (Remember: kilo 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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