Quick questions on Kinetic theory and the gas laws (QCE Chemistry Unit 2)

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is pressure from the particle picture?

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Pressure is the total force exerted by particle-wall collisions divided by the wall area. Three things can change pressure:

What is q1?

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State Boyle's law and explain it using kinetic molecular theory. [3 marks]

What is q2?

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4.00 \, \text{L}

vessel at

300 \, \text{K}

contains gas at

150 \, \text{kPa}

. The gas is compressed to

1.00 \, \text{L}

and warmed to

400 \, \text{K}

. Calculate the new pressure.

What is q3?

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Kinetic theory assumes (i) negligible molecular volume and (ii) no intermolecular forces. (a) State a condition where each assumption breaks down. (b) Predict whether real

\text{NH}_3

25^{\circ}\text{C}

deviates above or below ideal.

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