Definitions thermal phy, ideal gas

Question 1

Avogardo’s constant

Answer 1

Number of atoms of carbon 12 in 12g of carbon 12 is equal to 6.02x10^23

Question 2

Mole

Answer 2

SI base unit of amount of substance, it is the amount containg as many particle as there are atoms in 12g of carbon 12

Question 2

Ideal gas (3 mark definition)

Answer 2

obeys the equation PV=nRT, where P is pressure in Pa, V is volume in m3, T is temp in Kelvin. for all values of P, V and T

Question 3

Radian

Answer 3

Angle subtended at the centre of a circle by an arc of length equal to the radius of the circle.

Question 4

Internal energy

Answer 4

sum of potential energy and kinetic energy (of particles) (total) energy of random motion of particles