thermal physics

Question 1

what is boyle’s law

Answer 1

pressure is inversely proportional to volume

Question 2

what is charles law

Answer 2

volume is proportional to temperature

Question 3

what’s the pressure law

Answer 3

pressure is proportional to temperature

Question 4

what is avogadros law

Answer 4

number of molecules are proportional to volume

Question 5

what is the ideal gas equation

Answer 5

pV=NkT
pV=nRT

Question 6

what is k in the gas equation

Answer 6

boltzmann constant (1.38x10^-23)

Question 7

how do you find the number of molecules from moles

Answer 7

N=n x Na

Question 8

equation linking R, k and Na

Answer 8

R=k x Na

Question 9

what are the assumptions of the kinetic theory of gases

Answer 9

-all gas particles are identified
-all collisions are elastic
-the particles motion is random
-there are no intermolecular forces between gas particles
-there is a statistically significant number of particles
-all particles obey newtons laws of motion
-total volume of gas is negligible compared to volume of container
-duration of collisions is negligible

Question 10

what’s the average force of the wall on a particle

Answer 10

F=dp/dt = -mu^2/l

Question 11

what is sensible heat

Answer 11

energy which causes a change in temperature

Question 12

what is latent heat

Answer 12

energy which causes a change of state at the boiling/melting point

Question 13

what is the equation for sensible heat

Answer 13

Q=mcdT

Question 14

what is the equation for latent heat

Answer 14

Q=mL

Question 15

what is the first law of thermodynamics

Answer 15

the change in internal energy of a system is equal to the total energy transfer due to work and heat

Question 16

what is internal energy

Answer 16

the sun of the randomly distributed kinetic and potential energies of the molecules in a system

Question 17

what is absolute zero

Answer 17

0K/-273 degrees C, the temperature where internal energy of any system is minimised