Honors Thermo/Nuclear Chemistry Test Review

The SI unit of heat and energy is the __________.

• calorie
• heat
• joule
• watt

Temperature is a measure of average [blank] energy of individual atoms.

• heat
• potential
• mechanical
• kinetic

ΔH value in an endothermic reaction is a positive number.

• True
• False

 _?_  is the amount of energy required to raise the temperature of 1 gram of any substance 1^oC.

• Specific heat
• A calorie
• Thermal energy
• Conduction

As 120 g of hot milk cools in a mug, it transfers -20, 000 J of heat to the environment. What is the temperature change of the milk? The specific heat of milk is 2.6 J/g·°C. (Q=mcΔT)

• -64 °C

• 1.56 °C

• 640 °C

• cannot be determined

How much heat does an aluminum block absorb if 10.00 grams are heated from 25.0^oC to 50.0^oC? the specific heat of aluminum is 0.900J/g^oC

• 450

• -450

• 225

• -225

Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC

• Wood
• Water
• Both are the same

A material was cooled from 100ºC to 40ºC.  What is the temperature change?

• 60ºC
• 40ºC
• -60ºC
• -40ºC

How does heat flow?

• Always from cold to warm
• Always from warm to cold
• Both warm to cold & cold to warm
• It depends on the temperature

A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C.  Calculate the specific heat capacity of iron.    

• 0.46 J/gx^oC
• 1.654 J/gx^oC
• 2,567,446.875 J/gx^oC