# Physical science

Which statement correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant?(1 point)

The relationship is inversely proportional; as temperature increases, volume increases in the same way.

The relationship is directly proportional; as temperature increases, volume increases in the same way.

The relationship is directly proportional; as temperature increases, volume decreases in the same way.

The relationship is inversely proportional; as temperature increases, volume decreases in the same way.

2.Which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant?(1 point)

An increase in pressure causes particles to move closer together, increasing the volume.

An increase in pressure causes particles to move closer together, decreasing the volume.

An increase in pressure causes particles to move farther apart, decreasing the volume.

An increase in pressure causes particles to move farther apart, increasing the volume.
3.The ideal gas law is represented by PV=nRT. As volume is held constant and the temperature increases, how would the pressure be expected to change?(1 point)

It would decrease.

It would become zero.

It would remain constant.

It would increase.

4. When the pressure of a gas decreases, which quantity will increase, assuming all other variables are held constant?(1 point)

R
V
T
n

5.Two balloons hold two different gases. The gases are held at the same pressure, volume, and temperature. Which quantity can differ between the two gases?(1 point)

the number of moles of each gas
the number of moles of each gas

the mass of each gas
the mass of each gas

the gas constant of each gas
the gas constant of each gas

the molar volume of each gas

B
B
C
D
A

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1. I agree with 1 and 2. I don't agree with 3 and 4. For 5 I agree with your answer; however, I think B is correct also.
I don't understand how you can answer 3 or 4 incorrectly. Let me pick one of those and go through it with you. Here is 4
"4. When the pressure of a gas decreases, which quantity will increase, assuming all other variables are held constant?(1 point)"
So PV = nRT. Do these one at a time. I'll start with T.
option 1. If V, n R are constant we can rewrite the equation as P*k = k*T so if P goes sown T must go down.
option 2. R. But you know R is a constant and won't change.
option 3. n. PV = nRT. P*k = n*k. Same as #1. If P goes down n must go down.
option 4. V. PV = nRT. PV = k. So if P goes down, V MUST go up to keep k constant. For example. if you consider P = 2 and V = 4 then k = 8. So we halve P to 1 we must double V to 8 so that 1*8 = 8. So the answer is that by decreasing P the only variable going up is V.

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DrBob222
2. Gee, Doc, you're a big help to these kids. WHY DON'T YOU GET A LIFE AND ACTUALLY TEACH??? I DON'T CARE IF I'M BANNED FROM ACCESS FROM THIS SITE, BUT I THINK I SPEAK FOR ALL OF THEM WHEN I SAY DO SOME ACTUAL TEACHING!!!!!!

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3. 1. directly proportional, as temp increases, volume increases in the same way
2. particles move closer together, decreasing volume
3. it would increase
4. v
5. mass of each gas

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4. le juice is right

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5. mhm “le juice” is correct :) just took the Gases Under Pressure quick check

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6. THANK U

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7. Thank yuuuuuuuu

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8. le juice is the man

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9. I AGREE WITH YOUUUU PLEASE DON'T GET BANNED 🤞🤞

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10. Thank You

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11. le juice, i hope both sides of ur pillow are cold

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12. le juice is correct thanks bae

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13. Idk about le juice, but for me, it’s the mcchicken

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14. Really mcchicken.
?😂

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15. FANKS LE JUICE <33

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16. Ty juice

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17. jhit shlidn

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18. le Juice is officially defined as the G.O.A.T!!!!!!

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19. thanks juice

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20. My boi le juice is correct. also who the frick was that person that left one singular dislike? I KNOW IT WAS YOU DR.BOB222.

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21. it's
D
D
C
C
B

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22. Le juice thank youuuuuu!!!

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