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kolezko [41]
3 years ago
14

When Luis burns wood in a campfire, the particles in the wood break down and energy is released. What type of energy does the wo

od contain before Luis burns it?
heat

electrical

chemical

light
Chemistry
1 answer:
matrenka [14]3 years ago
8 0

Answer:

chemical energy is stored in the wood before combustion.

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B

Explanation:

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Complete the sentence
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Explanation:

physical change

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A 1.25g sample of copper (cCu=0.386Jg∘C) is initially at a temperature of 25.0∘C. If the sample absorbs 87.4J of heat, what is i
professor190 [17]

Answer: Final temperature = 206∘C

Explanation:

Heat Energy is given as  

q= mCΔT

ehere

q= Heat energy = 87.4J

m= mass=1.25g

C=specific heat c= 0.386Jg∘C) ,

ΔT =  Change in temperate of which the final temperature= 25.0∘C

 q= mCΔT

ΔT = q/mC

ΔT = 87.4/ 1.25 X 0.386=181.14∘C

But,

T final- T initial = ΔT

T final = T initial + ΔT

T final = 25.0∘C +181.14∘C=206.14∘C rounded to 206∘C

4 0
3 years ago
In the heating curve of an unknown substance, the line labeled C represents what change(s)?
IceJOKER [234]

Answer:

C) Temperature and Kinetic Energy.

Explanation:

Hello there!

In this case, according to the generic heating curve on the attached file, it possible to see that on the point C, whereas the line is diagonal, the temperature increases, but also the kinetic energy increases because the molecules gain energy due to the increase of the temperature. It is important to say that on flat lines, like those on B and D, the phase change takes place and just the potential energy change.

In such a way, we infer that the answer is C) Temperature and Kinetic Energy.

Best regards!

6 0
3 years ago
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If energy cannot be created, where did the types of energy you observed when the tortilla chip burned come from?
anzhelika [568]
The fire that burned the chip is thermal energy.
3 0
3 years ago
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