1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Damm [24]
3 years ago
7

How do you if a reaction is exthermic

Chemistry
1 answer:
Artist 52 [7]3 years ago
3 0

Answer:

To know if a reaction/experiment is exothermic or endothermic depends on the temperatures of the two liquids you are trying to mix. First before mixing your liquids take the temperature of both of them and write it down. then mix both liquids together to get your reaction and take the temperature of both mixed together. write it down. Did the temperature of your liquids increase or decrease? this question will determine weather the reaction was endothermic or exothermic. Endothermic meaning the temperature got cooler and Exothermic meaning the temperature got hotter/warmer

EX. | starting temperature- 72 F | ending temperature- 82 F | Exothermic

EX 2. | starting temperature- 72 F | ending temperature- 69 F | Endothermic

Explanation: I hope this helped you :)

You might be interested in
a) One kmol of N2O4 dissociates at 25℃, 1 atm to form an equilibrium ideal gas mixture of N2O4 and NO2 in which the amount of N2
horsena [70]

Answer:

neq N2O4 = 0.9795 mol.....P = 0.5 atm; T = 25°C

Explanation:

             ni      change    eq.

N2O4    1          1 - x       0.8154.....P = 1 atm; T = 25°C

NO2      0        0 + x          x

∴ x = neq = Peq.V / R.T.....ideal gas mix

if P = 0.5 atm, T = 25°C; assuming: V = 1 L

⇒ x = neq = ((0.5 atm)(1 L))/((0.082 atm.L/K.mol)(298 K))

⇒ x = neq = 0.0205 mol

⇒ neq N2O4 = 1 - x = 1 - 0.0205 = 0.9795 mol

3 0
3 years ago
14 points!!! Pls tell me answer :3
iren [92.7K]
I’d say the last one
8 0
3 years ago
Read 2 more answers
Mario uses a hot plate to heat a beaker of 50mL of water. He used a thermometer to measure the temperature of the water. The wat
Alex777 [14]

Answer:

The boiling point decreases as the volume decreases.

Explanation:

The Temperature - Volume law otherwise called as Charles law is applied, which says that the volume of the given gas at constant pressure is directly proportional to the temperature measured in Kelvin. As the volume increases, the temperature also increases, if the volume decreases, then the temperature also decreases.

As per the Charles law, here the volume is decreased from 50 ml to 25 ml so the boiling point also decreases.

8 0
3 years ago
Read 2 more answers
Why is lead harmful to humans.
nalin [4]
It's harmful to humans; especially Children and Infants. Because it affects the development of the brain and nervous system 
7 0
3 years ago
Explain what is meant by energy and list two units in which energy is measured
dybincka [34]

Answer:

J (joule)  W(watt)

Explanation:

If you're looking for the definition it is

The most common definition of energy is the work that a certain force can do. Energy also cannot be created or destroyed and some examples are

light, heat, mechanical, potential, and kinetic

4 0
3 years ago
Other questions:
  • Salt crystals are shaped like cubes. Salt is part of the _____. isometric crystal system monoclinic crystal system hexagonal cry
    7·2 answers
  • Write the balanced neutralization reaction that occurs between H2SO4
    8·1 answer
  • Sulfur molecules exist under various conditions as s2. True or Fasle
    11·1 answer
  • What are the two major types of cells that occur in nature?
    12·2 answers
  • Please somebody give me the answers
    6·1 answer
  • HELP PLEASE , I NEED A A ON THE TEST I’ll give brain
    5·2 answers
  • M
    15·1 answer
  • Which of the following would be the best representation of input energy and then
    6·1 answer
  • Electrical energy is transformed into many energy forms and is used to power most of the household appliances we used every day.
    9·1 answer
  • Determine the number of valence electrons for sodium through the use of this table.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!