Lecture 19

Question 1

Explain why volume increases with temperature using KMT

Answer 1

As the temperature increases the KE of the particles increases; particles move faster and can move farther away from eachother. With increased kinetic energy the number and force of collisions with the movable walls increases resulting in a greater volume while the pressure remains constant.

Question 2

Assumptions of the Kinetic Molecular Theory of Gases (5)

Answer 2

• The individual particles can be considered to have negligible volume
• Gas particles have high KE and are in constant random motion
• Gas particles exert pressure due to collisions with container walls
• Gas particles do not interact with eachother (the distance between particles is so great they don’t feel the presence of others)
• the average KE (and therefore velocity) increases with increasing temperature

Question 3

Give the equation for mole fractions

Answer 3

mol of 1 component/ total mol of all components= X

- the sum of all mole fractions in a gas mixture is = 1

Question 4

Do you know how to find limiting reagents?

Answer 4

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