Question.3 (7 marks) a) Why the thermal conductivity of metal decreases with the increase in temperature.[1 mark] b) Why the thermal conductivity of liquids and gasses increases with the increase in temperature. [1 mark] c) What is the importance of free delocalized electrons in heat transfer? [2 marks] d) The sun's surface emits about 63 million watts of energy per square meter. How this is being calculated? [2 marks] e) What is the difference between heat capacity and specific heat? [1 mark]