3.2-1.
a)What is the difference between temperature and heat? b) between heat and
internal energy?
3.3-1.
Which are the four states of matter?
3.3-2. Draw
the Maxwell-Boltzmann speed distribution diagram and how it will change if the
temperature is increased.
3.3-3. Draw
a graph of a) potential energy b) the force between two atoms as a function of
the distance between them.
3.3-4. In
what way can these diagrams explain why objects generally expand when the
temperature increases?
3.4-1.
Heating 200 g of a material from +10oC to 300 K requires 50 kJ of
energy. Find the specific heat capacity of this material.[14.7 kJkg-1K-1]
3.4-2. Find
the heat capacity of the same object.[2.9 kJK-1]
3.4-3. The
latent heats of a) fusion b) vaporisation for water are 334 kJkg-1
and 2260 kJkg-1. How much a) ice could be melted b) water at 373K
boiled with 100 000 J of energy? [a) 299g b) 44 g]
3.6-1.
Which are the 3 ways of transferring thermal energy?
3.7-1. What
pressure does a cube of stone with the side length 0.50 m and the density 3000
kgm-3 cause on the floor it stands on? [15 kPa]
3.7-2. 5.00
m3 of an ideal gas has the temperature 400 K. What will its volume
be if the pressure is doubled and the temperature increased to 500 K?[3.13m3]
3.7-3. Draw
in a diagram of pressure as a function of volume a graph for a) isobaric
expansion b) isothermal expansion c) adiabatic expansion d) any isochoric
process
3.9-1. A
gas at 50 kPa expands isobarically from 2.00 m3 to 3.20 m3.
Find the work done by the gas.[60 kJ]
3.8-1. If
20 kJ of heat flowed into the gas during this, find its change in internal
energy.[-40 kJ]
3.11-1.
Find the efficiency of a heat engine which does 300 J of work when 800 J of
heat flows out of it. [27%]
3.12-1. The
Carnot efficiency of an ideal heat engine is 40% when it releases
"waste" heat at a temperature of 300K. What minimum temperature must
be found somewhere in the engine? [500 K]
3.13-1. In
what way is a refrigerator relevant to the second law of thermodynamics?