ET unit 8 -- zeroth and first law

Thermodynamics is the study of ---

• efficient coal mining practices

• steam engines in history

• heat energy turning into other forms of energy

• thermometers

Heating water to turn it into steam causes which process in a steam engine?

• compression

• expansion

In a heat engine, the gas inside the cylinder is the ---.

• System

• Surroundings

​ Any process that increases the volume of a given mass of gas is called ---.

• specific heat

• compression

• thermodynamics

• expansion

Heat will not flow between two objects in thermal equilibrium.

• zeroth law of thermodynamics

• first law of thermodynamics

Which statement is true?

• Block A is in thermal equilibrium with Block C, which is in equilibrium with B. Therefore, Block A is in equilibrium with B.

• Block A is transferring heat energy to Block B, using the expansion of Block C according to the first law of thermodynamics

The first law of thermodynamics is based on what essential idea?

• Thermal equilibrium is reached between two or more objects in direct contact

• Energy is conserved in thermodynamic systems

• No engine can be 100% efficient

• A system can have zero energy if it is cooled to 0 K.

Which process increases the energy of the system?

• heating the gas

• the expanding gas moves the wheel

Adding heat to the System ____ the energy of the Surroundings.

• increases

• decreases

In the example, the air in the milk jug is the ---

• System

• Surroundings