Science Homework Help

Question 2

In a container of gas, all molecules have the same kinetic energy at a certain temperature T.

Group of answer choices

True

False

Question 3

What is the definition of a mole?

Group of answer choices

The amount of a certain (large) number of particles

The average kinetic energy of a certain (large) number of particles

The mass of a certain (large) number of particles

Question 4

What is the total kinetic energy of 2 moles of helium gas (He, monoatomic) at 300 K? Round your answer to the nearest integer.

Question 5

Which one of the following is NOT one of the postulates of the ideal-gas model?

Group of answer choices

The particles are moving quickly

The particles are moving randomly

The gas is made up of a large number of particles

The collisions between the particles are perfectly elastic

The particles are far from each other and interact only rarely when they collide

Question 60.5 pts

What is the temperature (in kelvin) of 0.306 moles of gas that is confined to a 3.36-L container at a pressure of 9.25 atm? Give your answer to two decimal places.

Question 7

0.551 moles of an ideal gas are confined to a rigid container (V = 5.57 L). The pressure of gas at T = 914 K was 6.03 atm. What is the pressure (in atm) at T = 1,746? Give your answer to two decimal places.

Question 8

What is the name we give to a process in which no heat is transferred to or from the system?

Group of answer choices

isothermal

isovolumetric

isobaric

isochoric

adiabatic

Question 9

In a constant-pressure process, when gas expands, the work is leaving the system.

Group of answer choices

True

False

Question 10

Which one of the following could be the ratio gamma for a triatomic ideal gas?

Group of answer choices

9/7

7/5

5/3

Question 11

When do we use R, and when do we use kB, as a rule?

Group of answer choices

We can use R and kB completely interchangeably

We use R when we need to calculate the total energy, and we use kB when we need to calculate average energy per mode

We use R when we deal with an ideal gas, and we use kB when we talk about non-ideal gas

We use R when we talk about macroscopic amounts of gases (moles), and we use kB when we talk about a small number of particles