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Question
Find the kinetic energy of 5 litres of a gas at STP, given the standard pressure is 1.013 × 105 N/m2.
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Solution
Given: P = 1.013 × 105 N/m2, V = 5 litres = 5 × 10-3 m3
E = `3/2"PV"`
`= 3/2(1.013xx10^5 "N"/"m"^2)(5xx10^-3 "m"^3)`
= 7.5 × 1.013 × 102 J
= 7.597 × 102 J
This is the required energy.
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