Chemistry In Focus
Chemistry In Focus
6th Edition
ISBN: 9781305084476
Author: Tro, Nivaldo J., Neu, Don.
Publisher: Cengage Learning
Question
Chapter 9, Problem 57E
Interpretation Introduction

Interpretation:

Increase in energy consumption between 1949 and 2012 is to be estimated and the average yearly increase during this period is to determined. The increase in energy production between 1949 and 2012 is to be estimated and the average yearly increase during this period is to be determined. The gap between the production and the consumption in 2012 are to be calculated.

Concept Introduction:

Energy is the property that is required by an object to perform work and to heat itself and it can be measured.

The average change is calculated by dividing the change in the value by the elapsed time.

Expert Solution & Answer
Check Mark

Answer to Problem 57E

Solution:

a)

The energy consumption between 1949 and 2012 is 0.952quad/yr.

b)

The energy production between 1949 and 2012 is 0.71quad/yr.

c)

The gap between production and consumption in 2012 is 15quad/yr.

Explanation of Solution

a) The increase in the energy consumption between 1949 and 2012 and the average yearly increase during this period.

The energy consumption in 1949is35quad and in 2012is95quad.

The average energy consumption between 1949 and 2012 is calculated as follows:

The energy consumption in 1949is35quad and in 2012is95quad.

Theyearlyaverageconsumption=Energyconsumptionin2012Energyconsumptionin194920121949

Substitute the value of energy consumption in 1949 and 2012 in the above expression.

Theyearlyaverageconsumption=(95quad35quad2012yr1949yr)=(60quad63yr)=0.952quad/yr

Hence, the average yearly energy consumption between 1949 and 2012 is,

0.952quad/yr.

b) The increase in energy production between 1949 and 2012 and average yearly increase during this period.

The energy production in 1949is35quad and in 2012is80quad.

The average energy production between 1949 and 2012 is calculated as follows:

The energy production in 1949is35quad and in 2012is80quad.

Theyearlyaverageproduction=Energyproductionin2012Energyproductionin194920121949

Substitute the value of energy production in 1949 and 2012 in the above expression.

Theyearlyaverageproduction=(803520121949)=(4563)=0.71quad/yr

Hence, the energy production between 1949 and 2012 is 0.71quad/yr.

c) The gap between production and consumption in 2012.

The gap between production and consumption in 2012.

The gap between production and consumption in 2012 is calculated as follows:

Thegapbetweenproductionandconsumption=(The energy productionin 2012The energy consumption in 2012).

Substitute the value of energy production and energy consumption in the above expression.

Thegapbetweenproductionandconsumption=(8095)=15quad/yr

Hence, the gap between production and consumption in 2012 is 15quad/yr.

Conclusion

The energy consumption between 1949 and 2012, the energy production between 1949 and 2012 is 0.952quad/yr, and the gap between the production and the consumption in 2012 is 15quad/yr.

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Chapter 9 Solutions

Chemistry In Focus

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