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patriot [66]
3 years ago
11

The average kinetic energy of water molecules increases when -

Chemistry
1 answer:
lianna [129]3 years ago
8 0
Answer: option <span>C: H2O(l) at 10°C changes to H2O(l) at 20°C
</span>

Explanation:

To solve this questions use the fact the temperature is a measure of the average kinetic energy of the particles of a substance.

For a given substance, the higher the temperature the higher kinetic energy, the lower the temperature the lower the kinetic energy


That is a statement derived from the kinetic theory.

The kinetic energy states that as the temperature of a substance increases, so do the average velocity of its particles and so the average kinetic energy.

Thas is why gases have a higher kinetic energy than liquids and liquids have a higher kinetic energy than solids.

The options A<span>: H2O(s) changes to H2O(l) at 0°C and B: H2O(l) changes to H2O(s) at 0°C describe changes at constant temperature, so in them the  average kinetic energy does not change.</span><span>
</span><span>
</span><span>The option C: H2O(l) at 10°C changes to H2O(l) at 20°C, as said, is the right answer because it is a process in which the temperature is increasing, so the average kinetiic energy is also increasing.</span><span>
</span><span>
</span><span>The option D: H2O(l) at 20°C changes to H2O(l) at 10°C corresponds to a decrease of the kinetic energy, since the temperature is decreasing.
</span><span>
</span>
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What properties of matter explain why the weight of an object on the moon is different than the weight of the same object on ear
algol13

Answer:

Gravity explains this.

Explanation:

Weights and mass are different terms .

Weight is defined as the force exerting on the surface due to the mass and gravity of acceleration.

W=m*g

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4 0
3 years ago
A gas occupies a volume of 60 L at a temperature of 0.5 K. What will the volume be at 4 K?
Flauer [41]

Answer:

480 L

Explanation:

In order to solve this question, you should be familiar with gas laws. (I will attach a picture showing all of them under my answer.) In this question in particular, however, we only need Charles's Law because we're dealing with temperature and volume.

As we can see, Charles's Law is:

\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }

or, initial volume over initial temperature equals final volume over final temperature.

In this question, 60 L is our <u>initial volume,</u> and 0.5 K is our <u>initial temperature</u> (K being Kelvin). We are only given 4 K as our <u>final temperature</u>. We are asked to solve for the <u>final volume</u>. Let's set up the equation and solve for V_{2}:

--------------------------------------------------------------------------------------------------------------

(60) / (0.5) = V_{2} / (4)

↓

120 = V_{2} / 4

×4           ×4

↓

V_{2} = 480 L

--------------------------------------------------------------------------------------------------------------

There's our answer! Feel free to comment if you have any questions about my answer :)

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Explanation:

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