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Chapter 5.8, Problem 2.4ACP
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### Chemistry & Chemical Reactivity

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

#### Solutions

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Section
BuyFindarrow_forward

### Chemistry & Chemical Reactivity

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

# Now compare the fuels on an energy-equivalent basis. What volume of ethanol would have to be burned to get the same energy as 1.00 L of octane? When you burn enough ethanol to have the same energy as a liter of octane, which fuel produces more CO2?

Interpretation Introduction

Interpretation:

The volume of ethanol would have to be burned to get the same energy of an octane and the fuel which reduces more CO2 has to be identified

Concept Introduction:

Heat energy required to raise the temperature of 1g of substance by 1k.Energy gained or lost can be calculated using the below equation.

q=C×m×ΔT

Where,

q= energy gained or lost for a given mass of substance (m),

C =specific heat capacity

ΔT= change in temperature

Explanation

Let x be the volume of ethanol

Given value of one liter of octane is 3.106â€‰Ã—104â€‰kJ (From Question 99074-5.2-2Q)

Given value of one liter of ethanol is 2.105â€‰Ã—104â€‰kJ (From Question 99074-5.2-2Q)

Volume of ethanol needed =2.105â€‰Ã—â€‰104kJ/Lâ€‰C2H5OHâ€‰Ã—â€‰x =3.106â€‰Ã—â€‰104kJ

Solving for x, we get,

x=1

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