Question
Asked Nov 26, 2019
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19
rus Imanne
1. How many kilojoules of energy are needed to change 50.0 g of water at 25.0 C to
steam at 100."? The specific heat of water is 4.184 J/g'C, and the heat of
vaporization of water is 2259 J/g. Show your Work. Pay attention to significant fiqures.
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19 rus Imanne 1. How many kilojoules of energy are needed to change 50.0 g of water at 25.0 C to steam at 100."? The specific heat of water is 4.184 J/g'C, and the heat of vaporization of water is 2259 J/g. Show your Work. Pay attention to significant fiqures.

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Expert Answer

Step 1

It is required to calculate the energy required to convert 50 g of water at 25 oC to steam at 100 oC. First it is required to calculate the heat required to increase the temperature to 100 oC and then the heat required to convert water into steam.

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Step 2

The heat required to increase the temperature to 100 oC is calculated as,

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Q1 mCAT Q1 50 x 4.184 x (100 25) Q1 15690 J Q1 15.69 kJ

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Step 3

Now heat required to convert water into steam is calculated as,

Heat of vaporization of water is 22...

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Q2 50 x 2259 = 112950 J Q2=112.95 kJ

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