Unit 14: Thermochemistry (Kinetic/Potential and Internal Energy

Which phase change is endothermic?

• H₂O(l) → H₂O(g)

• I₂(g) → I₂(s)

• Hg(l) → Hg(s)

• H₂S(g) → H₂S(l)

What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s

• 676 J
• 3.25 J
• 17J
• 338 J

Which is the best example that something has kinetic energy?

• a. a car parked on a steep hill 
• b. a tennis ball rolling across the court
• c. a picture hanging on the wall 
• d. a piece of coal before it's burned 

Convert 76.55 J to cal.

• 18.3 cal

• 22.60 cal

• 27.41 cal

• 32.54 cal

What are the two factors that affect kinetic energy?

• time and energy
• power and mass
• mass and speed
• time and work

1142 J of heat are added to a cylinder, which causes its contained gas to expand from 1.35 L to 4.18 L under a constant external pressure of 1.03 atm. Calculate the internal energy of this system.

• 255 J

• 576 J

• 847 J

• 1,437 J

__________ is stored energy. 

• Potential
• Kinetic
• None of the above 
• All of the above 

A cinder block is sitting on a platform 20 m high. It weighs 7.9 kg. Calculate the potential energy.

• 158 J

• 755.33 J

• 1,548.4 J

• 2,955.01 J

What is the unit of measurement for kinetic energy

• Newton
• Joule
• Watt
• Kilogram

A golf pro swings his driver which weighs 0.75Kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.

• 2700 J
• 16.9 J
• 1350 J
• 45 J