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Author Question: Explain how increasing the efficiency of cars could help contain greenhouse warming. What will be ... (Read 17 times)

asan beg

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on: Jul 28, 2018
Explain how increasing the efficiency of cars could help contain greenhouse warming.
 
  What will be an ideal response?

Question 2

Suppose reaction A involves the breaking of bonds and 75 J of energy, reaction B involves the breaking of bonds and 40 J of energy, and reaction C involves the making of bonds and 125 J of energy.
 
  What is the overall A + B + C reaction energy? Is this an exothermic or an endothermic reaction? Explain.


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ong527

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Reply #1 on: Jul 28, 2018
Answer to Question 1

More cars being more efficient would mean smaller use of fossil fuels overall,
reducing emissions of CO2 . Of course, if people just drive more ...

Answer to Question 2

In making bonds, the total energy release was 125 J. This is more than the energy
supplied to break bonds, 75 J + 40 J = 115 J. Overall in this reaction, bonds are made and
net energy is supplied by the chemical system to the outside. This is an exothermic reaction,
because energy of 10 J = 125 J - 115 J can be extracted from the system when the
reaction occurs.


asan beg

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Reply 2 on: Jul 28, 2018
Excellent

bigcheese9

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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