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
Fynjy0 [20]
3 years ago
14

What does Hess’s law state?

Chemistry
2 answers:
kirza4 [7]3 years ago
4 0
Hess's law states that the energy change in an overall chemical reaction is equal to the sum of the energy changes in the individual reactions comprising it. In other words, the enthalpy change of a chemical reaction (the heat of reaction at constant pressure) does not depend on the pathway between the initial and final states. The law is a variation of the first law of thermodynamics and conservation of energy.
satela [25.4K]3 years ago
3 0

Answer:

C. The enthalpy of a reaction is the sum of the enthalpies of intermediate reactions.

Explanation:

The heat of any reaction  ΔH∘f  for a specific reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction.

You might be interested in
Why does the Moon have a greater effect on the tides than the Sun?
IceJOKER [234]

Answer:

The correct answer is B.

Explanation:

I hope this helps. :)

6 0
3 years ago
A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/°C. The
Anna35 [415]

Answer:

-24.76 kJ/g; -601.8 kJ/mol

Explanation:

There are two heat flows in this experiment.

Heat from reaction + heat absorbed by calorimeter = 0

             q1                +                     q2                         = 0

           mΔH             +                    CΔT                        = 0

Data:

m = 0.1375 g

C = 3024 J/°C

ΔT = 1.126 °C

Calculations:

0.1375ΔH + 3024 × 1.126 = 0

           0.1375ΔH + 3405 = 0

                        0.1375ΔH = -3405

                                   ΔH = -24 760 J/g = -24.76 kJ/g

ΔH = -24.76 kJ/g ×24.30 g/mol = -601.8 kJ/mol

3 0
3 years ago
Can anyone check my chemistry answers?
frutty [35]
I check all of them. most of them correct but one

in question 6, the answer is the third choice. remember to find the neutrons, you take the atomic mass minus the atomic number. 38 - 18= 20
4 0
4 years ago
Please help I really need but this time I'm fr I don't have much time ill mark brainliest
FinnZ [79.3K]

Answer:

i fi am not wrong the correct answer is  D

Explanation:

5 0
3 years ago
Read 2 more answers
8. Which one of these does not describe a Mineral?
Yakvenalex [24]

Answer:

solid

Explanation:

5 0
3 years ago
Other questions:
  • Classify the chemical reaction shown here: Mg + H2SO4 → MgSO4 + H2
    6·2 answers
  • A couple purchases a house for $400,000.00. They pay 20% down at closing, and take out a mortgage of $320,000.00. The mortgage c
    9·1 answer
  • How much work does the climber do on his pack if his pack weighs 90 N and he climbs to a height of 30 m?
    12·1 answer
  • A gas-filled weather balloon has a volume of 59.0 L at ground level, where the pressure is 759 mmHg and the temperature is 20.4
    14·1 answer
  • During cooling, the kinetic energy of the molecules falls. Why does this happen?
    8·2 answers
  • Which energy changes are associated with a liquid boiling?
    11·2 answers
  • training doctors to recognize child abuse and explain how you could apply it to teaching. Write a short paragraph, using complet
    11·1 answer
  • Where is the color rock located?
    7·1 answer
  • In YOUR OPINION, should the United States try to reduce the amount of nonrenewable resources we use to produce electricity? Why?
    11·2 answers
  • What material would make the most efficient hot pack?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!