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 140 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?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Activation energy of a chemical reaction Activation energy of a chemical reaction
Environmental Energy Flow Environmental Energy Flow
An example of a urine chemical analyzer. An example of a urine chemical analyzer.
Chemical equilibrium and the law of mass action. Chemical equilibrium and the law of mass action.
How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree? How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree?
Draw a full and complete mechanism for the following reaction shown below. Draw a full and complete mechanism for the following reaction shown below.
Video: Bone processes - resorption and deposition, remodeling and response to stress in adult bones

For a complete list of videos, visit our video library