Thermochemistry Practice

The specific heat of aluminum is 0.21 J/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

• 105 J
• 10.5 J
• 1.05 J
• 0.105 J

20 g of water. specific heat of water is 4.18 J/g°C.  temperature changes from 25° C to 20° C, how much heat energy (q) moves from the water to the surroundings?

• 400 J
• 210 J
• 80 J
• 4.18 J

In an endothermic reaction the system is releasing energy.

• True
• False

For an endothermic reaction, the heat is on the ____ side.

• reactant
• product
• either side

For an exothermic reaction, the heat is on the ____ side

• reactant
• product
• either side

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

What does m stand for?

• Heat-Joules

• Mass-Grams

• Specific Heat-J/g*C

• Temperature Change-*C

Sweating is an __________________ process because heat is released.

• endothermic

• exothermic