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rjkz [21]
2 years ago
13

which of these releases heat a. melting candle wax b.boiling water to make stem c. burning wood in a campfire d. making popcorn

over a fire
Chemistry
1 answer:
zvonat [6]2 years ago
8 0

c. burning wood in a campfire

Explanation:

Wood burning in a campfire is an exothermic process.

An exothermic reaction is one in which heat is liberated to the surroundings. The heat content of the reactants is greater than that of the products.

Every burning process is an exothermic reaction.

An exothermic reaction liberates heat to the surrounding.

Other option given takes heat from the surrounding.

learn more:

Exothermic process brainly.com/question/10567109

#learnwithBrainly

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A 2.0 L container of nitrogen gas had a pressure of 3.2 atm. What volume would be necessary to decrease the pressure to 1.0 atm
beks73 [17]

Answer:

6.4 L

Explanation:

When all other variables are held constant, you can use Boyle's Law to find the missing volume:

P₁V₁ = P₂V₂

In this equation, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You can find the theoretical volume by plugging the given values into the equation and simplifying.

P₁ = 3.2 atm                      P₂ = 1.0 atm

V₁ = 2.0 L                          V₂ = ? L

P₁V₁ = P₂V₂                                                    <----- Boyle's Law

(3.2 atm)(2.0 L) = (1.0 atm)V₂                        <----- Insert values

6.4 = (1.0 atm)V₂                                           <----- Simplify left side

6.4 = V₂                                                        <----- Divide both sides by 1.0

6 0
2 years ago
A chemical reaction that releases heat to the surroundings is said to be __________ and has a __________ H at constant pressure
Savatey [412]

Answer:

The correct option is c) exothermic, negative.

Explanation:

Reactions that releases heat to the surroundings are called exothermic, and are characterized by negative entalpy (ΔH) values.

6 0
3 years ago
How does mechanical energy depend on other forms of energy??
Ksenya-84 [330]

Answer:

Other forms of energy can convert to mechanical energy

Explanation:

For example the electric or magnetic energy in a motor can convert to mechanical energy, or another example is when you put two magnets together they will clip together due to the magnetic energy that they have.

5 0
3 years ago
What is the new concentration of a solution of CaSO3 if 10.0 mL of a 2.0 M CaSO3 solution is diluted to 100 ml?
kifflom [539]

Answer: The new concentration of a solution of CaSO_{3} is 0.2 M 10.0 mL of a 2.0 M CaSO_{3} solution is diluted to 100 mL.

Explanation:

Given: V_{1} = 10.0 mL,      M_{1} = 2.0 M

V_{2} = 100 mL,           M_{2} = ?

Formula used to calculate the new concentration is as follows.

M_{1}V_{1} = M_{2}V_{2}

Substitute the values into above formula as follows.

M_{1}V_{1} = M_{2}V_{2}\\10.0 mL \times 2.0 M = M_{2} \times 100 mL\\M_{2} = 0.2 M

Thus, we can conclude that the new concentration of a solution of CaSO_{3} is 0.2 M 10.0 mL of a 2.0 M CaSO_{3} solution is diluted to 100 mL.

5 0
2 years ago
PLEASE HELP I DONT WANT TO FAIL!! ):
Fudgin [204]
Hope this helps :) I didn’t know how to write subscripts so I wrote it down on some paper.

3 0
3 years ago
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