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elena55 [62]
3 years ago
11

In what ways is thermal energy transferred during physical and chemical changes

Physics
1 answer:
Sphinxa [80]3 years ago
3 0

Explanation:

chemical changes

>produce new substances w/ different chemical structure/ properties

> thermal energy can be used to BREAK bonds (endothermic)

>thermal energy can be transferred to a chem rxn to help form new products (endothermic)

> heat can be released by an exothermic chemical reaction (excess energy- the total energy used to break bonds is less than energy released in forming new bonds)

physical changes

>does not result in new substances (typically changes in state- solid, liquid, gas)

> thermal energy can be transferred to EVAPORATE water (add thermal E... water (liquid) to steam (gas)) or FREEZE water (remove thermal E... water (liquid) to ice (solid))

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Group 7A of the periodic table contains the?
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The correct answer is A. Most reactive non metals.

Firstly if some one knows how to read the periodic table he would have no confusion in deciding whether group 7 has metals or non metals. Group 7 contains non metals so basically we can easily cancel out two options of metals.

Secondly group 7 non metals are the most reactive non metals as they need only one electron in order to complete their valence shell and become stable.


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2 years ago
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Why is electric current scalar quantity with having direction ?​
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Explanation:

It represents the direction of flow of positive charge but is treated as a scalar quantity because current follows the laws of scalar addition and not the laws of vector addition. The angle between the wires carrying current does not affect the total current in the circuit.

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1 year ago
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What is the domain theory of ferromagnetism?
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3 years ago
What happens when a light bulb is disconnected in a parralel circuit? ​
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Answer:

Hope i could help!

Explanation:

so all but one light could be burned out, and the last one will still function.

5 0
3 years ago
A garage door opener has a power rating of 350 watts.
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