Unit 4 practice 2

What is 50 C in Kelvin?

• 223
• 323
• 100
• 50

The kinetic theory of matter states that all of the particles that make up matter are constantly

• growing
• shrinking
• crying
• moving

If the pressure of a gas starts out at 200kPa and increases to 600kPa, what would the initial temperature be if it ended up at 300K?

• 50K

• 200K

• 400K

• 100K

At 20^oC, the same volume of helium and hydrogen gas will have

• the same average kinetic energy

• the same kinetic energy for all particles

• different kinetic energy as they weigh different amounts

• different kinetic energy as the particles are different sizes

Energy is lost when particles collide with each other or the walls of the container

• True

• False

Which process takes the longest to occur?

• melting
• boiling
• freezing
• heating the solid

How many Joules of energy are required to make 100 grams of ice at 0 C completely melt?

• 200 J
• 400 J
• 30,000 J
• 2,000,000 J

What is the equation to measure change in Thermal Energy?

• Q=mc∆t
• Q=mc
• Q= ∆mct
• m=QC

There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?

• Large cup (Trenta)
• Small cup (Tall)
• Medium cup (Venti)
• All three are the same temperature so they have the same thermal energy

A high specific heat means...

• It requires less energy to change temperature
• It requires more energy to change temperature
• It heats up very quickly