Quick questions on The ideal gas equation and molar volume (QCE Chemistry Unit 2)

6short 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 units for QCE Chemistry?

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QCAA's chemistry data sheet supplies R in J/(mol K) and defines standard conditions for chemistry. With these units, products PV come out in joules, matching the energy units of nRT.

What are molar volume of a gas?

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The molar volume V_m is the volume occupied by 1 mol of an ideal gas at a specified pressure and temperature.

What is wrong R for the unit set?

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Use R = 8.314 J/(mol K) with kPa and L. Using R = 0.0821 L atm /(mol K) with kPa will be off by a factor of 100.

What is q1?

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State the ideal gas equation, defining each variable and its SI unit. [3 marks]

What is q2?

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Calculate the volume occupied by

0.500 \, \text{mol}

\text{N}_2

50.0^{\circ}\text{C}

and

120 \, \text{kPa}

. [3 marks]

What is q3?

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A sealed

2.00 \, \text{L}

flask holds nitrogen at

200 \, \text{kPa}

and

25^{\circ}\text{C}

. (a) Calculate moles. (b) Calculate mass.

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