3b Thermo Flashcards
Heat capacity
It’s ability to how long it takes to heat up and loose heat
A material which takes longer to heat up has a greater heat capacity
Good refrigerant has
Low condensing pressure , low evaporating temp
Pressures
= force /area
Heat is given off to its surroundings or lost
Temp remains the same
Isothermal
Isothermic
Heat is not transferred to or from
Adiabatic
Process where volume does not change is
Isochoric
Combined gas law
P1V1/T1= P2V2/T2
Boyles law
P1/V1
Pressure varies inversely with temp
Pressure is proportional to I/V
Charles law
V1/T1
Volume varies directly with temp
Convection does not happen in
Solids
When water is in vapour state, it is
Below its critical point
A good refrigerant has what properties?
Low condensing properties & low evaporating temp
A compressor increases
Potential energy
A heat pump
To internally heat uses an
Internal condenser
When a block of metal goes from a solid to liquid, it’s density will
Decrease
