Question

QUESTION 1 (25 MARKS) Answer the following questions using statements, proofs, calculations, and/or examples. No marks will be given for guesses. (i) What is the state postulate? (3) (ii) Derive an expression for the entropy change of an incompressible liquid (4) (iii) Derive an expression for the reversible work for a closed system. (6) (iv) Is it possible for two objects to be in thermal equilibrium if they are not in thermal contact with each other? (3) (v) Do hotter objects always contain more heat than cooler objects? (3) (vi) Can a kitchen be cooled by simply leaving the door of the refrigerator open? (3) (vii) A journalist appears on the Nightly News stating that the world does not have an energy crisis because there are billions and billions of Joules of energy stored in the earth, the oceans and the sky. How would you evaluate such a statement? (3)

          QUESTION 1 (25 MARKS)
Answer the following questions using statements, proofs, calculations, and/or examples. No
marks will be given for guesses.
(i) What is the state postulate? (3)
(ii) Derive an expression for the entropy change of an incompressible liquid (4)
(iii) Derive an expression for the reversible work for a closed system. (6)
(iv) Is it possible for two objects to be in thermal equilibrium if they are not in thermal contact
with each other? (3)
(v) Do hotter objects always contain more heat than cooler objects? (3)
(vi) Can a kitchen be cooled by simply leaving the door of the refrigerator open? (3)
(vii) A journalist appears on the Nightly News stating that the world does not have an energy crisis
because there are billions and billions of Joules of energy stored in the earth, the oceans and the
sky. How would you evaluate such a statement? (3)

QUESTION 1 (25 MARKS)
Answer the following questions using statements, proofs, calculations, and/or examples. No
marks will be given for guesses.
(i) What is the state postulate? (3)
(ii) Derive an expression for the entropy change of an incompressible liquid (4)
(iii) Derive an expression for the reversible work for a closed system. (6)
(iv) Is it possible for two objects to be in thermal equilibrium if they are not in thermal contact
with each other? (3)
(v) Do hotter objects always contain more heat than cooler objects? (3)
(vi) Can a kitchen be cooled by simply leaving the door of the refrigerator open? (3)
(vii) A journalist appears on the Nightly News stating that the world does not have an energy crisis
because there are billions and billions of Joules of energy stored in the earth, the oceans and the
sky. How would you evaluate such a statement? (3)

Added by Meredith S.

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