heat calcs

What property describes how easily an object absorbs or releases heat.

• Temperature

• Specific heat

• Thermal Configuration

• Enthalpy of Fusion

What property describes the average kinetic energy of the molecules in a system?

• Temperature

• Specific heat

• Heat

• Enthalpy

Mr. Rosenbaum is tired and wants coffee. He takes 500 g of water with a specific heat of 4.18 J/g^oC and heats it from 20^oC to 90^oC to make coffee. How much heat was added?

• 41,800

• 146,300

• 188,100

• 229,900

A student is complaining that the room is too hot and changes the thermostat from 70 ^oC to 15 ^oC. The specific heat of air is 1 J/g^oC and there is 100,000 grams of air in the room. How much heat was removed.

• 1,500,000

• 5,500,000

• 7,000,000

• 8,500,000

How much energy is required to heat up 12kg of copper from 10 °C to 120 °C. The specific heat capacity is 390 J/kg °C.

• 46800 J
• 561600 J
• 514800 J

Tags

NGSS.HS-PS3-1

How much heat energy is needed to raise the temperature of 2kg of water from 5 °C to 100 °C? The specific heat capacity of water is 4200 J/kg °C.

• 42000 J
• 840000 J
• 798000 J

How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?

• 1400 J
• 2800 J
• 210,000 J
• 1,400,000 J

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 12.82 °C
• 24.12°C
• 351 °C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

For the formula:
 Q= m c ∆T
The  units for specific heat are:

• g /J C
• °C/g J
• kJ/g
• J/g°C

Tags

NGSS.HS-PS3-1

The SI unit of heat and energy is the __________.

• calorie
• heat
• joule
• watt