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GalinKa [24]
3 years ago
11

When ethanol is burned, it's converted into carbon dioxide and water. Does the ethanol undergo a physical change or a chemical c

hange? Explain?
Chemistry
1 answer:
NARA [144]3 years ago
3 0
It's a chemical change because ethanol is converted into other substances.
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How many joules of energy are required to melt 423g of water at 0°C?
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The amount of heat needed to melt 423 g of water at 0°C is 141282 J

The heat required to melt water can be obtained by using the following formula:

<h3>Q = mL </h3>

Q is the heat required.

L is the latent heat of fusion (334 J/g)

m is the mass.

With the above formula, we can obtain the heat required to melt the water as illustrated below:

Mass of water (m) = 423 g

Latent heat of fusion (L) = 334 J/g

<h3>Heat (Q) required =? </h3>

Q = mL

Q = 423 × 334

<h3>Q = 141282 J</h3>

Therefore, the amount of heat needed to melt 423 g of water at 0°C is 141282 J

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