Thermodynamics

In thermodynamics, what is a system?

• The object or group of objects we are thinking about.

• Materials with different temperatures.

• An object in thermal equilibrium.

• A cup of tea.

If a hot mug of tea is stirred, the internal energy of the mug decrease.

• True

• False

In this classroom, the temperature is at equilibrium.

• True

• False

The Celsius scale is based on the properties of...

If 'T' is the temperature expressed in Kelvin's scale and θ is the temperature in degrees Celsius...

• T = θ - 273

• θ = T - 273

• T = θ + 275

• θ = 273

The ice point is always the same in the Kelvin scale

• True

• False

The specific latent heat has the following units:

• J kg

• J kg²

• J^-1 kg

• J kg^-1

If the temperature of a substance is constant, the internal energy cannot increase

• True

• False

During a change of state the temperature is constant

• True

• False

The specific ______ heat is the energy needed to change the state of 1 kg of a substance (Temperature is constant)