Thermochemistry Review

The diagram shows what happens when zinc reacts with hydrochloric acid. Which of these best describes the energy transformation that occurs during this reaction?

• Thermal energy - kinetic energy

• Kinetic energy -potential energy

• Chemical energy - thermal energy

• Potential energy - chemical energy

During an exothermic reaction, heat content in the surroundings increases because

• heat energy is destroyed during reactions

• the reaction absorbs heat energy

• the energy contained in the reactants is lower then the products

• the energy contained in the products is lower than the reactants

The diagram represents two solids and the temperature of each. What occurs when the two solids are placed in contact with each other?

• Heat energy flows from solid A to solid B. Solid A decreases in temperature

• Heat energy flows from solid A to solid B. Solid A increases in temperature

• Heat energy flows from solid B to solid A. Solid B decreases in temperature.

• Heat energy flows from solid B to solid A. Solid B increases in temperature.

Tags

NGSS.HS-PS3-4

The amount of heat energy required to change the temperature of 12 g of gold from 45°C to 15°C is -47 J. What is the specific heat capacity of gold?

• 0.13 J/(g°C)

• 17,000 J/(g°C)

• 1600 J/(g°C)

• 0.065 J/(g°C)

Tags

NGSS.HS-PS3-4

___________________ is the capacity to do work or supply heat.

• energy

• heat changes

• specific heat

• thermochemistry

Ice cream melting is an example of an __________ process.

• endothermic

• exothermic

Tags

NGSS.HS-PS3-4

Sweating is an __________________ process because heat is released.

• endothermic

• exothermic

Tags

NGSS.HS-PS3-4

what does c stand for?

• heat capacity

• specific heat

• mass

• temperature

What is the specific heat of water?

• 4.184 J/gC

• 1.00 cal/gC

• All of the above

• none of the above

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

• exothermic

• endothermic

Tags

NGSS.HS-PS3-4