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 111 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?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Energy costs of locomotion. Energy costs of locomotion.
For this bimolecular reaction, the rate constant k is second order For this bimolecular reaction, the rate constant k is second order
The Glutamine Synthetase Reaction The Glutamine Synthetase Reaction
Food webs show feeding relationships and energy flow Food webs show feeding relationships and energy flow
What is the value for Kc for the following reaction: PbCl2(s) ⇌ Pb2+(aq) + 2 Cl-(aq), if ... What is the value for Kc for the following reaction: PbCl2(s) ⇌ Pb2+(aq) + 2 Cl-(aq), if ...
Calculate the number of grams of solute in 500.0 mL of 0.169 M KOH. Calculate the number of grams of solute in 500.0 mL of 0.169 M KOH.
Video: Subunits of DNA And Semi Conservative Replication

For a complete list of videos, visit our video library