Ideal Gas Law
Authored by Mr Boyle
Chemistry
5th Grade
Used 45+ times
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13 questions
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1.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
1.5 moles of nitrogen gas is kept at a temperature of 30 °C and 50 kPa of pressure. What volume does the gas occupy? Give your answer to 2 d.p.
[Gas constant = 8.314 J mol-1 K-1]
(a)
Answer explanation
1) pV = nRT, rearrange to solve for volume: V = nRT/p
2) Convert 30 °C to kelvin: 30 + 273 = 303 K
3) Insert values: V = (1.5 x 8.314 x 303) / 50
4) V =75.57 L
2.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
2.2 moles of gas is kept at 400 kPa and -70 °C. What is the volume of this container? Give your answer to 2 d.p.
[Gas constant = 8.314 J K-1 mol-1]
(a)
Answer explanation
1) Rearrange pV = nRT to solve for V: V = nRT/p
2) Convert °C to Kelvin by adding 273: 273 + -70 = 203 K
3) Insert values to equation:
V = (2.2 x 8.314 x 203) / 400
4) V = 9.28 L
3.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
What volume is occupied by 0.02 moles of gas at 500 K and 150 kPa of pressure?
Give your answer to 2 s.f.
[Gas constant = 8.314 J K-1 mol-1]
(a)
Answer explanation
1) Rearrange pV = nRT to solve for volume: V = nRT/p
2) Insert values into equation:
V = 0.02 x 8.314 x 500 / 150
3) V = 0.055 L
4.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
What pressure is exerted by 3 moles of gas stored in a 1 litre balloon at 45 °C? Give your answer to 1 d.p.
[Gas constant R = 8.314 J K-1 mol-1]
(a)
Answer explanation
1) Rearrange equation to solve for pressure: p = nRT/V
2) Convert °C to K by adding 273: 45 + 273 = 318 K
3) Insert values into equation:
p = (3 x 8.314 x 318) / 1
4) p = 7931.556 -> 7931.6 kPa
5.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
What pressure is exerted by 0.33 moles of gas inside a 0.4 dm3 container at 25 °C?
[Gas constant R = 8.314 J K-1 mol-1]
(a)
Answer explanation
1) Rearrange equation to solve for pressure: p = nRT/V
2) Convert °C to K by adding 273: 273+25 = 298 K
3) Insert values into equation:
p = 0.33 x 8.314 x 298 / 0.4
4) p = 2043.975 kPa
6.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
What pressure is exerted by 0.015 moles of gas inside a 2.0 dm3 container at -20 °C? Give your answer to 2 s.f.
[Gas constant R = 8.314 J K-1 mol-1]
(a)
Answer explanation
1) Rearrange equation to solve for p: p = nRT/V
2) Convert °C to K by adding 273: -20 + 273 = 253 K
3) Insert values into equation:
p = 0.015 x 8.314 x 253 / 2
4) p = 15.775 kPa
5) p = 16 kPa (2 s.f.)
7.
FILL IN THE BLANKS QUESTION
5 mins • 15 pts
A 1.5 L container of gas has a pressure of 30 kPa and a temperature of 10 °C. How many moles are within the container? Give your answer to 3 s.f.
[Gas constant R = 8.314 J K-1 mol-1]
(a)
Answer explanation
1) Rearrange pV = nRT to solve for n:
n = pV/RT
2) Convert °C to K by adding 273:
10 + 273 = 283 K
3) Insert values into equation:
n = 30 x 1.5 / 8.314 x 283
4) n = 0.0191 moles (3 s.f.)
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