This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Suppose reaction A involves the making of bonds and 225 J of energy, reaction B involves the ... (Read 127 times)

ericka1

  • Hero Member
  • *****
  • Posts: 544
on: Jul 28, 2018
Suppose reaction A involves the making of bonds and 225 J of energy, reaction B involves the breaking of bonds and 400 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.

Question 2

The meaning of the word energy is immediately clear to anyone.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

laurnthompson

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 28, 2018
Answer to Question 1

In making bonds, the total energy release was 225 J + 125 J = 350 J. This is less
than the energy supplied to break bonds, 400 J. Overall in this reaction, bonds are broken
and net energy is supplied to the chemical system by the outside world. This is an
endothermic reaction, because energy in the amount of 50 J = 400 J - 350 J needs to be
added to the system for the reaction to occur.

Answer to Question 2

We wish I would hope the student will recognize from this opening chapter the
difficulty here.


ericka1

  • Member
  • Posts: 544
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

Jsherida

  • Member
  • Posts: 314
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Absorption of light energy by an electron Absorption of light energy by an electron
Solar Energy Input Varies with Latitude Solar Energy Input Varies with Latitude
1-16 The Sun’s Daily Path and the Energy It Deposits Here 1-16 The Sun’s Daily Path and the Energy It Deposits Here
The distribution of high-energy, nutritious biscuits was a lifeline in the first days after the 2010 The distribution of high-energy, nutritious biscuits was a lifeline in the first days after the 2010
How many grams of H2 gas can be produced by the reaction of 54.0 grams of Al(s) with an excess ... How many grams of H2 gas can be produced by the reaction of 54.0 grams of Al(s) with an excess ...
Nine $10 000, 4% bonds with interest payable semi-annually and redeemable at par are purchased ... Nine $10 000, 4% bonds with interest payable semi-annually and redeemable at par are purchased ...
Video: Requirements for nervous signals

For a complete list of videos, visit our video library