Quelpr
6 marksFirst Law of Thermodynamics

CAPE Physics Unit 1 · 2009 · Paper 2 · Question 6(a)(ii)

Explain why the heat capacity of a gas at constant pressure, Cp, is greater than the heat capacity of the gas at constant volume, Cv. Write down an expression that relates the two quantities with the Universal Gas Constant R.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 6(a)(i)Write down an equation for the First Law of Thermodynamics clearly explaining the meaning of the symbols used.[6 marks]
  2. 6(b)(i)Using data from the graph, calculate the number of moles of gas.[3 marks]
  3. 6(b)(ii)a)Using data from the graph, calculate the quantity of heat required to take the gas from C to A along CA.[2 marks]
  4. 6(b)(ii)b)Using data from the graph, calculate the quantity of heat required to take the gas from C to B along CB.[2 marks]
  5. 6(b)(iii)Using data from the graph, calculate the work done by the gas along the path from C to B.[2 marks]

More practice: the rest of this paper · more First Law of Thermodynamics questions · all CAPE Physics Unit 1 past papers