8 original questions from New Regents. The worksheet, answer key, and browser practice are free.

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Charles’s Law 4 questions

Charles’s Law

New Regents original practice • Name: ____________________ Date: __________ Show your work for written answers.

For a fixed amount of gas at constant pressure, V1/T1 = V2/T2. Use Kelvin temperatures, with T(K) = T(°C) + 273.15.

Question 1

A fixed sample occupies 0.600 L at 300 K. What volume will it occupy at 450 K if pressure stays constant?

  1. 0.400 L
  2. 0.600 L
  3. 0.900 L
  4. 1.35 L

Question 2

A fixed gas sample is 1.50 L at 26.85 °C. Find its volume at 126.85 °C at constant pressure. Show the Kelvin conversions.

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Question 3

Which graph shape represents volume versus Kelvin temperature in the ideal model at constant pressure and amount?

  1. A straight line through the origin with positive slope
  2. A horizontal line above zero
  3. A straight line through the origin with negative slope
  4. A curve whose volume decreases as temperature rises

Question 4

A student predicts the volume will double when a gas is heated from 25 °C to 50 °C at constant pressure. Explain why that conclusion is incorrect.

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A Freely Moving Piston 4 questions

A Freely Moving Piston

Use the information below to answer the questions.

A fixed amount of gas in a freely moving piston reaches a new equilibrium in each trial. The gas pressure is the same in each row.

TrialTemperature (K)Volume (mL)
A240120
B300150
C360180

Question 5

Calculate V/T for trials A and C with units. State what the results show.

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Question 6

Which volume is consistent with the model at 400 K under the same pressure?

  1. 125 mL
  2. 160 mL
  3. 200 mL
  4. 240 mL

Question 7

Describe how the particle motion and volume change from trial A to trial C.

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Question 8

If the piston is locked and the same sample is warmed, which condition for using the given equation may no longer hold?

  1. The amount of gas is fixed.
  2. The gas has a measurable temperature.
  3. The pressure stays constant.
  4. The volume can be measured.

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