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

Author Question: Why are combustion reactions generally exothermic? A) Hydrogen easily pulls electrons from the ... (Read 78 times)

dbose

  • Hero Member
  • *****
  • Posts: 597
on: Jul 29, 2018
Why are combustion reactions generally exothermic?
 
  A) Hydrogen easily pulls electrons from the oxygen in water molecules and are reduced.
  B) During combustion oxygen is oxidized, which gives off lots of energy.
  C) Combustion involves the transfer of electrons to oxygen, which has an extremely high tendency for gaining electrons.
  D) It is highly exothermic because combustion involves an oxidation-reduction reaction between a metallic material and oxygen.

Question 2

What is happening at the anodic region?
 
  Rust has a tendency to form when iron in contact with water reacts according to the following reaction:
 
  4 Fe + 3 O2  2 Fe2O3
 
  A) Iron is being oxidized.
  B) Oxygen is being oxidized.
  C) Oxygen is being reduced.
  D) Iron is being reduced.
  E) none of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

briseldagonzales

  • Sr. Member
  • ****
  • Posts: 303
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: A


dbose

  • Hero Member
  • *****
  • Posts: 597
Reply #2 on: Jul 29, 2018
Thanks


briseldagonzales

  • Sr. Member
  • ****
  • Posts: 303
Reply #3 on: Jul 29, 2018
Welcome :)


« previous next »
 

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

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.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Hydrogen Bonding and the Properties of Water Hydrogen Bonding and the Properties of Water
Temperament refers to stable differences in the emotional reactions of different children to similar ... Temperament refers to stable differences in the emotional reactions of different children to similar ...
Combustion chamber volume is the volume above the piston with the piston at top dead center. Combustion chamber volume is the volume above the piston with the piston at top dead center.
Typical combustion and exhaust temperatures. Typical combustion and exhaust temperatures.
Lineweaver–Burk plots of the reactions with and without a competitive inhibitor Lineweaver–Burk plots of the reactions with and without a competitive inhibitor
Animated Light-independent reactions in CAM plants. Animated Light-independent reactions in CAM plants.
Video: Brain Lobes Animation

For a complete list of videos, visit our video library