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12 marksFirst Law of Thermodynamics

CAPE Physics Unit 1 · 2003 · Paper 2 · Question 8(b)(i)

3.0 mol of Oxygen is heated from 270 K to 320 K at a constant pressure of 5 x 10⁵ Pa.

Calculate the thermal energy supplied to the gas.

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Other parts of this question

  1. 8(a)(i)a)State THREE assumptions made in the kinetic theory of gases.[8 marks]
  2. 8(a)(i)b)Explain how the kinetic theory is used to explain the pressure in a gas.[1 mark]
  3. 8(a)(ii)Three molecules have speeds of v, 4v and 8v. What is their mean speed and root mean square (r.m.s.) speed?[1 mark]
  4. 8(b)(ii)Calculate the change in volume of the gas.[1 mark]
  5. 8(b)(iii)Calculate the work done by the gas as it expands.[1 mark]
  6. 8(c)(i)What is the increase in internal energy?[1 mark]
  7. 8(c)(ii)Find the molar heat capacity at constant volume for oxygen. (Molar heat capacity at constant pressure = 29 J mol⁻¹ K⁻¹)[1 mark]

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