Thermodynamics Part 1 Practice

How does the heat from the sun reach Earth?

• Conduction

• Convection

• Radiation

• It doesn't, Earth has no heat

A sealed jar full of n molecules of gas has a pressure of 1,000 N/m². If the jar was compressed such that the volume was cut in half and heat removed such that the temperature stayed constant, what would the new pressure be, in N/m²?

Mathematical Equivalence

ON

Two blocks are connected by a conductive rod. If a graph has plotted Q / Δt on the y-axis, and the temperature differential (ΔT) on the x-axis, what is the slope equivalent to?

• (kA) / L

• kA

• A / L

• L / (kA)

Tags

NGSS.HS-PS3-4

"Gas molecules move around randomly" and "the volume of the gas molecules is negligible" are...

• assumptions of the ideal gas law

• true statements that apply to all gases no matter what

• invalid statements

• the second law of thermodynamics

Block 1, 2, and 3 are all in thermal equilibrium. This means that they all have the same...

• Volume

• Temperature

• Total joules of heat energy

• Thermal conductivity

Tags

NGSS.HS-PS3-4

If the velocity of a molecule was to double, how would its kinetic energy change?

• Double as well

• Multiply by 4

• Cut in half

• Velocity is not related to kinetic energy

Tags

NGSS.HS-PS3-2

You grab a hot pan and burn your hand. How did that heat transfer into your hand?

• Conduction

• Convection

• Radiation

• MAGIC

Why does room temperature plastic feel "cool" and room temperature metal feels "cold"?

• They have different thermal conductivities

• Metal has more electrons

• The area of thermal transfer is greater in the colder material

Tags

NGSS.HS-PS3-4

If the average kinetic energy of the molecules of a gas was to double, what would happen to the temperature of the gas?

• Double as well

• Multiply by 4

• Cut in half

• Molecular kinetic energy is not related to temperature

Tags

NGSS.HS-PS3-2

What does thermal equilibrium mean?

• Same pressure

• Same cross sectional area

• Same entropy

• Same average kinetic energy

Tags

NGSS.HS-PS3-4