Definitions and Principles - Thermal

Question 1

Temperature

Answer 1

For a body at thermal equilibrium, temperature is the internal energy

Question 2

Heat

Answer 2

Transfer of internal energy

Question 3

Thermal Equilibrium

Answer 3

No heat flows

Question 4

Heat Capacity

Answer 4

The energy required to raise the temperature of an object

Question 5

Conduction

Answer 5

The action of molecules with greater kinetic energy on those with less

Question 6

Convection

Answer 6

Transfer of heat due to the motion of a fluid

Question 7

Isothermic

Answer 7

(Thermodynamic process where) temperature remains constant

Question 8

Internal Energy

Answer 8

The sum of kinetic energy of atoms & molecules and the potential from inter-molecular interaction

Question 9

Isobaric

Answer 9

(Thermodynamic process where) pressure remains constant

Question 10

Isochoric

Answer 10

(Thermodynamic process where) volume remains constant

Question 11

Adiabatic

Answer 11

(Thermodynamic process where) no heat is added or subtracted

Question 12

Pascal’s Principle

Answer 12

‘The change in pressure applied to an incompressible fluid is transmitted throughout that fluid’

Question 13

Archemede’s Principle

Answer 13

When a body is partially submerged, the buoyancy force acting upwards on the body is equal to the weight of the fluid displaced

Question 14

Zeroth Law of Thermodynamics

Answer 14

If body A is in thermal equilibrium with body C, and body B is in thermal equilibrium with body C, A is in thermal equilibrium with B.

Question 15

Calorimetry

Answer 15

Measurement of heat capacities. (If the system is mechanically & thermally isolated then there is no mechanical work & heat flow is internally conserved)