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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

One food product has an energy content of 170 kcal per serving and another has 280 kJ per serving. Which food provides the greater energy per serving?

Interpretation Introduction

Interpretation: The food that provide greater energy has to be given.

Concept Introduction:

Joule: The joule is related directly to the units used for mechanical energy.

Calorie: The calorie is an older energy unit.  It is defined as the energy transferred as heat that is required to raise the temperature of 1g of substance by one degree Celsius.

  1Calorie =4.184joules (J).

Explanation

As the given two energy units are different, convert calorie into joule.

  Conversion of units:Given:280 kJ = 280 ×103JKnown: 1Calorie =4.184joules (J).Whereas,280 ×103J,

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