Question
Asked Dec 6, 2019
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In a 4.00 L pressure cooker, water is brought to a boil. If the final temperature is 115 °C at 3.65 atm, how many moles of steam are in the cooker?

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Expert Answer

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Step 1

The number of moles of steam can be calculated by using the ideal gas equation,

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PV = nRT Where, P is pressure, V is the volume, n is number of moles, T is temperature and R is universal gas constant (0.082 L atm mol-1 K-')

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Step 2

P = 3.65 atm

V = 4 L

T = 115 oC = 115 + 273 = 388 K

Substituting...

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PV = nRT 3.65 x 4 = n x 0.0821 x 388 n = 0.458 moles

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