Question 1

a. Does the specific internal energy of superheated water at 250 °C decrease or increase with an increase in pressure? (1 mark)

b. Separate the list P, V, ρ, T, U and S into intensive and extensive properties. (1 mark)

c. What is the lowest temperature in degree Celsius and degree Kelvin? (1 mark)

d. Two divers swim at 25 m depth. One of them swims right in under a cruise ship; the other stays away from the cruise ship. Who feels a greater pressure? (1 mark)

e. Can a pure substance exist in liquid form below the triple point? Answer in one sentence. (1 mark)