Question
Asked Nov 13, 2019
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How much heat is necessary to change 285 g of ice at -5°C to water at 20°C?

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Expert Answer

Step 1

Calculate the change in temperature in the case of ice from -5 ⁰C to 0 ⁰C.

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AT T-T 0°C-(-5°C) 5°C

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Step 2

Write the equation to find the amount of heat to change the temperature

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HimAT Heremis themass andcisthespecific heat of ice lkg H, 285g (0.5kcal - kg)(5°C) 1000g 0.71kcal

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Step 3

Write the equation for the heat ne...

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н, -тL, Here L, is thelatent heat of fusion of ice whichis80kcal - kg1 1kg Н, 3285g 1000g (80kcal -kg1 = 22.5kcal

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