Thermochemistry

Which of these processes is endothermic?

• freezing

• condensation

• deposition

• sublimation

Tags

NGSS.HS-PS1-4

A chemical reaction in a beaker causes the beaker to feel cold to the touch. What type of reaction occurred?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Which of these is the unit for specific heat?

• J

• J/g

• J/g^oC

• ^oC

Which of these phase changes requires energy to be released?

• boiling

• sublimation

• condensation

• melting

Tags

NGSS.MS-PS1-4

Which of these would indicate that particles of a substance can be in three different phases on a phase diagram?

• critical point

• triple point

• phase section

• solid line

Which of these statements is true?

• At the critical point on a phase diagram, a gas can no longer be changed to a liquid due to an increase in pressure.

• On a phase diagram you will find particles in three phases on a solid line segment.

• All substances have the same phase diagram.

• The normal boiling and melting points are found at 100 ^oC on a phase diagram.

High temperatures and low pressures will usually result in which phase?

• solid

• liquid

• gas

• plasma

Which type of energy is the energy stored in chemical bonds?

• kinetic energy

• potential energy

• chemical potential energy

• mechanical energy

Tags

NGSS.HS-PS1-4

Which relationship is correct?

• 1 calorie = 1 Calorie

• 1 calorie = 1000 Calories

• 1 Calorie = 4.184 Joules

• 1 calorie = 4.184 Joules

Tags

NGSS.HS-PS3-1

A piece of candy has 200 Calories per serving. How many calories of heat will be released when it is broken down?

• 200 calories

• 200,000 calories

• 836,800 calories

• 836.8 calories

Tags

NGSS.HS-LS1-7

NGSS.HS-PS1-4