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
-BARSIC- [3]
3 years ago
12

The change in enthalpy is the change in heat energy of a reaction and is calculated by (Hint: Hess' Law): Group of answer choice

s
a. Sum of reactant enthalpies plus the sum of product enthalpies
b. Sum of reactant enthalpies minus the sum of product enthalpies
c. Sum of product enthalpies times the sum of reactant enthalpies
d. Sum of product enthalpies minus the sum of reactant enthalpies
Chemistry
1 answer:
Stolb23 [73]3 years ago
8 0

Answer:

d. Sum of product enthalpies minus the sum of reactant enthalpies

Explanation:

The standard enthalpy change of a reaction (ΔH°rxn) can be calculated using the following expression:

ΔH°rxn = ∑n(products) × ΔH°f(products) - ∑n(reactants) × ΔH°f(reactants)

where,

ni are the moles of products and reactants

ΔH°f(i) are the standard enthalpies of formation of products and reactants

You might be interested in
100 POINTS!!!!<br><br> Please I need this page done lol
Alenkinab [10]

Answer:

okay.. Questions?????????

5 0
3 years ago
Recall rem = rad x q radiation weighting factor (q): the ability to transfer energy to the body 1 for photons 1 for electrons 2
tino4ka555 [31]

The biological risk for the first person than the second as a result of radiation weighting is 10 times.

<h3>What is radiation weighting factor?</h3>

As stated in the question, radiation weighting factor (q) is the ability to transfer energy to the body.

If radiation factor of proton = 2, and radiation factor of alpha particles = 20.

  • First person is exposed to alpha radiation = 20
  • Second person is exposed to protons = 2

Risk of first person with respect to second person = 20/2 = 10 times higher

Learn more about radiation factor here: brainly.com/question/24039736

#SPJ4

6 0
2 years ago
What is an example of entropy from everyday life?
Deffense [45]
A Campfire is an example, the solid wood becomes ash.
8 0
3 years ago
What is the molar mass of Pb(Cr2O7)2
bagirrra123 [75]

Answer:

The molar mass of Pb(Cr2O7)2 is 639.2 g/mol.

6 0
2 years ago
Read 2 more answers
If a Kleenex box has a length of 8cm, width or 2cm, and a height of 4cm what is the volume of the Kleenex box?
Anettt [7]

Answer:

The volume of the Kleenex box is 64 cm.

Explanation:

Volume = B x W x H

So:      V = 8cm x 2cm x 4cm = 64cm

3 0
3 years ago
Other questions:
  • The coinage metals -- copper, silver, and gold -- crystallize in a cubic closest packed structure. Use the density of silver (10
    15·1 answer
  • What is the net ionic equation of
    13·1 answer
  • On veut comparer l’efficacité de la configuration batch avec celle du continu CSTR pour la production de 10^3 tonnes de levures
    10·1 answer
  • How does chemical change affect the composition of matter
    14·1 answer
  • A saturated solution of Ammonium Chloride is dissolved in 100 g of water.
    15·1 answer
  • Help please I’ll give you brainless
    7·1 answer
  • What is the relationship in numbers of particles and pressure
    8·1 answer
  • What eventually happens to gas if its pressureis increased?​
    14·1 answer
  • After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Ins
    7·2 answers
  • Describe two carbon sequestering methods that could reduce the impact of deforestation
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!