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

Author Question: Calculate a value for Erxn for a chemical reaction if the reactants have an energy of -400 kJ/mol ... (Read 113 times)

serike

  • Hero Member
  • *****
  • Posts: 542
on: Aug 27, 2018
Calculate a value for Erxn for a chemical reaction if the reactants have an energy of -400 kJ/mol and the products have an energy of +100 kJ/mol. Is this reaction exothermic or endothermic?
 
  What will be an ideal response?

Question 2

Octane (C8H18 ) reacts with oxygen (O2 ) to form carbon dioxide (CO2 ) and water (H2O). When the equation below is balanced, the coefficient of octane is:
 
  C8H18 + O2  CO2 + H2O
  A) 8
  B) 25
  C) 2
  D) 16

Question 3

Which of the following has the highest molar mass?
 
  A) (NH4)3PO3
  B) Ca3(PO4)2
  C) Al2(SO3)3
  D) Co2(CO3)2


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

adammoses97

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Aug 27, 2018
Answer to Question 1

+500 kJ/mol. Reaction is endothermic.

Answer to Question 2

C

Answer to Question 3

C


serike

  • Hero Member
  • *****
  • Posts: 542
Reply #2 on: Aug 27, 2018
TY


adammoses97

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Aug 27, 2018
You're welcome


« previous next »
 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Ammonium as an energy source for chemoautotrophic bacteria in soil. Ammonium as an energy source for chemoautotrophic bacteria in soil.
The CHRIS manual entry for toluene. Useful information includes response information, chemical and ... The CHRIS manual entry for toluene. Useful information includes response information, chemical and ...
La Niña events store energy La Niña events store energy
Similarity of the chemical structure of 5-bromouracil (5-BU) and thymine Similarity of the chemical structure of 5-bromouracil (5-BU) and thymine
Expressing amounts of energy in different energy units is necessary to solve man Expressing amounts of energy in different energy units is necessary to solve man
Potential energy Potential energy
Video: HDL (high density lipoprotein)

For a complete list of videos, visit our video library