U6 Sections 6.1-6.4 QUIZ

Heat flows from _______ to ______ objects

• cooler to warmer
• warmer to warmer
• warmer to cooler
• cooler to cooler

When thermal energy is added to a substance, the substance's particles move:

• More rapidly at an increased distance from each other.

• More rapidly with less distance between each other.

• More slowly with a greater distance between each other.

• More slowly with a reduced distance between each other.

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ΔH at constant pressure.

• endothermic; positive
• endothermic; negative
• exothermic; negative
• exothermic; positive

Do the reactants in an exothermic reaction have a higher or lower energy than the products?

• Higher
• Lower

What does temperature measure?

• Heat
• ºC
• Kinetic Energy
• Thermal Energy

In an endothermic reaction the system is releasing energy.

• True
• False

What type of reaction is shown in the picture?

• endothermic
• exothermic

In an exothermic process, the surroundings are are gaining energy.

• True
• False

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

• one reaches a temperature of zero
• they both have an equal temperature
• one runs out of energy

When heat flows from system to the surroundings that is an example of an ________________ process.

• exothermic

• endothermic