PS3-4 Formative Review

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down

• They would stop moving

• They would speed up

• There would be no effect

If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ______

• one reaches a temperature of zero

• they both have equal temperature

• one runs out of energy

The total energy of all particles in a substance is called

• Temperature

• Thermal energy

• Degrees

• Mass

If the specific heat of water is 4.18J/gC, how much heat is required to increase the temperature of 1.2 kg of water from 23 C to 39 C?

• -80,256 J

• 80.256 J

• 80,256 J

• -80.256 J

For a skillet used for cooking, do you want a high or low specific heat?

• High so that it will need more energy to heat up

• Low so that it will change temperature quickly

A sample of iron receives 50J of heat energy that raises the temperature of the iron by 25C. If iron has a specific heat of 0.10 J/gC, what is the mass of the iron sample?

A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction. If the temperature began at 15 C and ended at 27.5 C, is the reaction endothermic or exothermic?

• Endothermic because it gained heat

• Exothermic because it gained heat

• Endothermic because it lost heat

• Exothermic because it lost heat

In an exothermic process, the surroundings are gaining energy

• True

• False

What does "q" mean in specific heat calculations?

• A measure of heat energy

• A change in heat energy

• A measure of kinetic energy

• A change in temperature

What is the tool that measures the heat of chemical reactions?

• Calorie

• Styrofoam cup

• Calorimeter

• Bunsen burner