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
dsp73
2 years ago
8

When does a endothermic reaction occur

Chemistry
1 answer:
hichkok12 [17]2 years ago
8 0

when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.

You might be interested in
A pendulum has 721 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom o
Sloan [31]

Answer:

721 J  

Step-by-step explanation:

At the bottom of its swing, all the potential energy of the pendulum has been converted to kinetic energy.

KE = 721 J

8 0
3 years ago
Read 2 more answers
1. What is an isomer? How many possible isomers of hexane are there? What are the structural differences between these isomers?
UNO [17]
When two compounds have same molecular formula but different structural formula, they are said to be isomers of each other and this phenomenon is called as isomerism. 

Hexane has six isomers.

The isomers of hexane have a difference in their structure due to parent chain length (chain isomerism). They are also differentiated on the basis of straight chain as in n-hexane and branched chain as in remaining five. Structures along with names are shown below.

8 0
3 years ago
How many pounds of carbon dioxide are emitted of 400 liter pls i need asap
Nookie1986 [14]

884 pounds of carbon dioxide are emitted in 400 litres.

What is a pound?

The pound is defined as the basic unit for weight in the Foot Pound Second (F.P.S) system and is equal to 16 ounces.

To convert a litre measurement to a pound measurement, multiply the volume by 2.204623 times the density of the ingredient or material. Thus, the volume in pounds is equal to the litres multiplied by 2.204623 times the density of the ingredient or material.

One litre of water weighs approximately 2.21 pounds.

So 400 liter = 400 liter x 2.21 pounds

= 884 pounds

Hence, 884 pounds of carbon dioxide are emitted in 400 litres.

Learn more about the pounds here:

brainly.com/question/4262393

#SPJ1

4 0
2 years ago
How are amplitude modulation and frequency modulation techniques similar?
Ivanshal [37]

Answer:

d

Explanation:

7 0
3 years ago
Read 2 more answers
When 0.5141 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.823 °C to 29.419 °C
natka813 [3]

Answer:

\Delta_{r}U of the reaction is -6313 kJ/mol

\Delta_{r}H of the reaction is -6312 kJ/mol

Explanation:

Temperature\,\,change= \Delta U = 29.419-25.823 =3.506^{o}C

q_{cal}= C \times \Delta T

=5.861 \times 3.596 = 21.076\,kJ

q_{rxn}= -q_{cal}= -21.076\,kJ

\Delta_{r}U= -21.076 \times \frac{154}{0.5141}= -6313\, kJ/mol

Therefore, \Delta_{r}U of the reaction is -6313 kJ/mol.

The chemical reaction in bomb calorimeter  is as follows.

C_{12}H_{10}(s)+\frac{27}{2}O_{2}(g)\rightarrow 12CO_{2}(g)+5H_{2}O(g)

Number\,of\,moles\Delta n=(12+5)-\frac{27}{2}=3.5

\Delta_{r}H=\Delta E+ \Delta n. RT

=-6313+3.5\times 8.314\times 10^{-3} \times 3.596=-6312\,kJ/mol

Therefore, \Delta_{r}H of the reaction is -6312 kJ/mol.

3 0
3 years ago
Other questions:
  • Isotopes are atoms with the SAME number of protons, but DIFFERENT numbers of neutrons. Question 8 options: True False
    9·1 answer
  • Assume that a hydrogen atom's electron has been excited to the n ???? 5 level. how many different wavelengths of light can be em
    8·2 answers
  • What is more inflammable? gasoline or ethanol?
    6·1 answer
  • Which of these electrons is a halogen?
    5·1 answer
  • Chemical equation for table salt and water
    8·2 answers
  • With respect to a fixed point, motion is defined as a change in-<br><br> A)speed<br> B)position
    11·1 answer
  • Based on Newton's third law and the force represented by the arrow, what is the reaction force in this scenario
    8·1 answer
  • The process that makes ice cubes shrink as they sit in a freezer is called.
    13·1 answer
  • What shape has the largest area to perimeter ratio.
    13·1 answer
  • What current (in a) is required to plate out 1. 22 g of nickel from a solution of ni2 in 0. 50 hour?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!