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2 years ago

Calculate the amount of heat energy required to heat up 21.5 grams of ice from -15 °C to 10°C.

Chemistry

1 answer:

Anuta_ua [19.1K]2 years ago

5 0

Answer:

8.74kj

Explanation:

There are three steps

Warming up the ice to its melitng point. THe nergy required to melt it completely. The energy requiered to warm up the water to a certain temp.

It can be seen by the three equations written

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dangina [55]

Answer: The element Na (Sodium) is getting oxidized and Hydrogen is getting reduced.

Explanation:

Oxidation reactions are the reactions in which addition of oxygen takes place.

Reduction reactions are the reactions in which loss of oxygen takes place.

For a given reaction:

$2Na(s)+2H_2O(l)\rightarrow H_2(g)+2NaOH(aq.)$

Sodium is getting oxidized because there is an addition of reaction with that element.

Hydrogen is getting reduced because there is a removal of oxygen with that element.

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svp [43]

Answer:

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Explanation:

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3 years ago

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kiruha [24]

The absence of standards of absolute and universal application.

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3 years ago

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TEA [102]

Answer:

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Explanation:

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3 years ago