C1- Thermal physics in domestic andindustrial applications

how do you convert kW to watts?

times 1000

How do you convert watts to megawatts?

times by 10⁶

How do you convert watts to gigawatts?

times by 10⁹

How do you convert kelvin to Celsius?

-273

How to convert celcius to kelvin?

+273

What is absolute zero?

the lowest temperature an object can be cooled to, where all thermal energy has been removed.

What is the unit for pressure?

pascal (p)

What is work done?

the energy done in a process is the amount of mechanical energy transferred

What unit is used to measure work?

joules (j)

What is the equation to calculate work done?

work done= force x distance moved in direction of the force

How do you calculate work done by a gas expanding?

work done= pressure x change in volume

What is the conservation of energy?

energy cannot be created or destroyed, only transferred

What is thermal equilibrium?

when 2 systems are in thermal contact, but no there is no net transfer of heat because their temperature in the same

How do you calculate energy efficiency?

What idea does an ideal gas fit?

• collisions are elastic

• small molecular size, compared to the volume of the gas

• molecules are mostly far apart, unless they collide

What is the equation for ideal gas equations?

pV= NkT