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Crank
3 years ago
11

Calculate the energy required to melt 21 g of ice at 0 oC.

Chemistry
1 answer:
vladimir1956 [14]3 years ago
7 0

<u>We are given:</u>

Mass of ice = 21 grams

The ice is already at 0°c, the temperature at which it melts to form water

Molar heat of fusion of Ice = 6.02 kJ/mol

<u>Finding the energy required:</u>

<u>Number of moles of Ice: </u>

Molar mass of water = 18 g/mol

Number of moles = given mass/ molar mass

Number of moles = 21 / 18 = 7/6 moles

<u>Energy required to melt the given amount of ice:</u>

Energy = number of moles * molar heat of fusion

Energy = (7/6) * (6.02)

Energy = 7.02 kJ OR 7020 joules

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<h3>Further explanation</h3>

In stochiometry therein includes  

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So the molar mass of a compound is given by the sum of the relative atomic mass of Ar  

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Ametal used in hot water system?​
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1.0 mol NiCl₂ contains → 6.022 x 10²³ molecules.

??? mol NiCl₂ contains → 6.188 x 10²¹ molecules.

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