Thermal Physics Active Recall QUESTIONS:
1. The molecules of all substances
contain which types of energy?
2. Why do molecules have kinetic
energy?
3. Why do molecules have potential
energy?
4. What does the amount of kinetic
and potential energy a substance
has depend on?
5. What is the definition of internal
energy?
6. What four factors is internal energy
determined by?
7. How can the internal energy of a
system increase? (2 ways)
8. How can the internal energy of a
system decrease? (2 ways)
9. What is the first law of
thermodynamics?
10.What does the first law of
thermodynamics apply to?
11.When a gas is expanded, explain in
terms of work done what happens
to the internal energy of the gas
12.When a gas is compressed, explain
in terms of work done what
happens to the internal energy of
the gas
13.What is the specific capacity of a
substance?
14.If a substance has a low specific
heat capacity, will it heat up and
cool down quickly or slowly?
15.How can the specific heat capacity
of a fluid be found?
16.How does a continuous flow
calorimeter measure the specific
heat capacity?
17.Why does the fluid flow over a
heating element?
18.What is changed in order to keep
the change in temperature
constant?
19.How do they find the mass of the
fluid?
20.The specific heat capacity if found
by assuming what is constant?
21.During a change of state, which
energies are changing?
22.What is needed to change the
state of a substance?
23.Which energies change when a
, substance is changing state?
24.What is latent heat?
25.What are the two types of latent
heat?
26.What is the specific latent heat of
fusion?
27.What is the specific latent heat of
vaporisation?
28.The larger the mass of the
substance, how much energy is
needed to change its state?
29.How can you see the latent heat of
fusion from a temperature heat
graph?
30.How can you see the latent heat of
vaporisation from a temperature
heat graph?
31.How do you calculate specific
latent heat?
32.How do you calculate specific heat
capacity?
33.Why does evaporating water
require 7 times energy than
melting the same amount of ice to
form water?
34.Why is the latent heat of
vaporisation of water much greater
than the specific latent heat of
fusion of water?
35.During a state change, what 2
things change and what stays the
same?
36.Why does the kinetic energy stay
the same even with a change of
state?
37.What is the potential energy in a
substance due to?
38.When heat is absorbed in melting
and boiling, what happens to
intermolecular forces?
39.When heat is released in freezing
and condensation, what happens
to intermolecular forces?
40.What is absolute zero? What is the
value of absolute zero in both
degrees and Kelvin?
41.What can be said for the kinetic
energy at absolute zero?
42.A change in temperature of 1K is
equal to change in temperature of
what degrees?
43.What 2 quantities are assumed to
be constant for all 3 ideal gas
1. The molecules of all substances
contain which types of energy?
2. Why do molecules have kinetic
energy?
3. Why do molecules have potential
energy?
4. What does the amount of kinetic
and potential energy a substance
has depend on?
5. What is the definition of internal
energy?
6. What four factors is internal energy
determined by?
7. How can the internal energy of a
system increase? (2 ways)
8. How can the internal energy of a
system decrease? (2 ways)
9. What is the first law of
thermodynamics?
10.What does the first law of
thermodynamics apply to?
11.When a gas is expanded, explain in
terms of work done what happens
to the internal energy of the gas
12.When a gas is compressed, explain
in terms of work done what
happens to the internal energy of
the gas
13.What is the specific capacity of a
substance?
14.If a substance has a low specific
heat capacity, will it heat up and
cool down quickly or slowly?
15.How can the specific heat capacity
of a fluid be found?
16.How does a continuous flow
calorimeter measure the specific
heat capacity?
17.Why does the fluid flow over a
heating element?
18.What is changed in order to keep
the change in temperature
constant?
19.How do they find the mass of the
fluid?
20.The specific heat capacity if found
by assuming what is constant?
21.During a change of state, which
energies are changing?
22.What is needed to change the
state of a substance?
23.Which energies change when a
, substance is changing state?
24.What is latent heat?
25.What are the two types of latent
heat?
26.What is the specific latent heat of
fusion?
27.What is the specific latent heat of
vaporisation?
28.The larger the mass of the
substance, how much energy is
needed to change its state?
29.How can you see the latent heat of
fusion from a temperature heat
graph?
30.How can you see the latent heat of
vaporisation from a temperature
heat graph?
31.How do you calculate specific
latent heat?
32.How do you calculate specific heat
capacity?
33.Why does evaporating water
require 7 times energy than
melting the same amount of ice to
form water?
34.Why is the latent heat of
vaporisation of water much greater
than the specific latent heat of
fusion of water?
35.During a state change, what 2
things change and what stays the
same?
36.Why does the kinetic energy stay
the same even with a change of
state?
37.What is the potential energy in a
substance due to?
38.When heat is absorbed in melting
and boiling, what happens to
intermolecular forces?
39.When heat is released in freezing
and condensation, what happens
to intermolecular forces?
40.What is absolute zero? What is the
value of absolute zero in both
degrees and Kelvin?
41.What can be said for the kinetic
energy at absolute zero?
42.A change in temperature of 1K is
equal to change in temperature of
what degrees?
43.What 2 quantities are assumed to
be constant for all 3 ideal gas
