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 56 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
Gracias!

momolu

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Energy is released from the breaking of the phosphate bond in ATP when converting to ADP. Energy is released from the breaking of the phosphate bond in ATP when converting to ADP.
Gibs free energy for hydrolysis of some phosphate compounds Gibs free energy for hydrolysis of some phosphate compounds
The overall reaction catalyzed by the NADH dehydrogenase complex The overall reaction catalyzed by the NADH dehydrogenase complex
The glutamine synthetase reaction occurs via an acyl phosphate intermediate The glutamine synthetase reaction occurs via an acyl phosphate intermediate
Carbohydrates Are Energy-Containing Nutrients Carbohydrates Are Energy-Containing Nutrients
How to find the reaction for each of the beams below. How to find the reaction for each of the beams below.
Video: Knee Animation

For a complete list of videos, visit our video library