1a)What is w when a gas is compressed from 38.3 L to 28.8 L using a constant ext

Question

1a)What is w when a gas is compressed from 38.3 L to 28.8 L using a constant external pressure of 745 mmHg? (Remember to include a "+" or "-" sign as appropriate.)

Enter your answer in acceptable SI units, accurate to 3 significant figures.

1b)What is w when 2.47 kg of H2O(l), initially at 25.0oC, is converted into water vapour at 137oC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL. (Remember to include a "+" or "-" sign as appropriate.)

Enter your answer in acceptable SI units, accurate to 3 significant figures. Use an acceptable SI abbreviation for units!

Explanation / Answer

w = pV = 133.32 * 745 * (28.8 - 38.3)/1000 = 943.57J (1mm = 133.32pa)

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