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irina1246 [14]
3 years ago
10

What does halogen mean?

Chemistry
1 answer:
Mademuasel [1]3 years ago
6 0
A Halogen is a group (or a column) on the periodic table. It contains fluorine, chlorine, bromine, and astatine!
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_____ energy is energy available to do work.
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Calculate the heat change involved when 2.00 L of water is heated from 20.0/C to 99.7/C in
IgorC [24]

Answer:

669.48 kJ

Explanation:

According to the question, we are required to determine the heat change involved.

We know that, heat change is given by the formula;

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Change in temperature = Final temp - initial temp

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Specific heat of water is 4.2 J/g°C

Therefore;

Heat change = 2000 g × 79.7 °C × 4.2 J/g°C

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Therefore, heat change is 669.48 kJ

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