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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro
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Ice has negative caloric content. How much energy, in each

Chapter 12, Problem 90P

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QUESTION:

Ice has negative caloric content. How much energy, in each of the following units, does your body lose from eating (and therefore melting) 145 g of ice?

(a) joules

(b) kilojoules

(c) calories (1 cal = 4.18 J)

(d) nutritional Calories or capital “C” calories (1000 cal = 1 Cal)

Questions & Answers

QUESTION:

Ice has negative caloric content. How much energy, in each of the following units, does your body lose from eating (and therefore melting) 145 g of ice?

(a) joules

(b) kilojoules

(c) calories (1 cal = 4.18 J)

(d) nutritional Calories or capital “C” calories (1000 cal = 1 Cal)

ANSWER:

Solution 90P

Here, we are going to calculate the amount of energy in the given units.

Step 1:

Heat of fusion may be defined as the amount of heat required to convert 1 mole of a solid to its liquid state. It is denoted by ΔHf.

Mathematically, it is given by,

                                         ΔHf = q / m, where  ΔHf = heat of fusion

                                                                      q = heat

                                                                       m = mass

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