Physics 2140 Discussion 1 worksheet
NAME ________________________________________________________
Learning outcomes:
• Analyze the relationships between thermal energy, kinetic energy, speed, and temperature of a gas
• Predict the pressure, volume, temperature, amount, and thermal energy of ideal gases and how these quantities
change in a thermodynamic process
• Analyze qualitatively and quantitatively the internal energy of a system and changes in internal energy due to
energy transfers (work and heat, enthalpy) using the basic energy model and the first law of thermodynamics
1. There are two containers of equal volumes, each filled with a different gas. Both containers have the same
number of moles of gas and are at the same temperature. The molecules of gas in container 1 are four times
more massive than the molecules of gas in container 2.
a. State which container, 1 or 2, has the larger value of the following quantities, or, if they are equal, state
that they are equal. Explain your reasoning.
i. Pressure
ii. “Average” (rms) speed of gas molecules
O
iii. Average kinetic energy of gas molecules
iv. Thermal energy
2. A container of 1.2 $%& of an ideal gas has a volume of 5.4 ) = 5.4 × 10−3 $3. The gas is at an initial
temperature of /50 0.
a. What is the initial pressure of the gas?
n 1.2 mot
v 5.4e 3ms
F 350 K
1354
NRT
TE
pv 1.218.3145
P
This study source was downloaded by 100000857952895 from CourseHero.com on 01-27-2023 02:30:31 GMT -06:00
https://www.coursehero.com/file/35250894/Discussion-1-worksheet-2-SOLUTIONS/
NAME ________________________________________________________
Learning outcomes:
• Analyze the relationships between thermal energy, kinetic energy, speed, and temperature of a gas
• Predict the pressure, volume, temperature, amount, and thermal energy of ideal gases and how these quantities
change in a thermodynamic process
• Analyze qualitatively and quantitatively the internal energy of a system and changes in internal energy due to
energy transfers (work and heat, enthalpy) using the basic energy model and the first law of thermodynamics
1. There are two containers of equal volumes, each filled with a different gas. Both containers have the same
number of moles of gas and are at the same temperature. The molecules of gas in container 1 are four times
more massive than the molecules of gas in container 2.
a. State which container, 1 or 2, has the larger value of the following quantities, or, if they are equal, state
that they are equal. Explain your reasoning.
i. Pressure
ii. “Average” (rms) speed of gas molecules
O
iii. Average kinetic energy of gas molecules
iv. Thermal energy
2. A container of 1.2 $%& of an ideal gas has a volume of 5.4 ) = 5.4 × 10−3 $3. The gas is at an initial
temperature of /50 0.
a. What is the initial pressure of the gas?
n 1.2 mot
v 5.4e 3ms
F 350 K
1354
NRT
TE
pv 1.218.3145
P
This study source was downloaded by 100000857952895 from CourseHero.com on 01-27-2023 02:30:31 GMT -06:00
https://www.coursehero.com/file/35250894/Discussion-1-worksheet-2-SOLUTIONS/
