Thermochemistry

A calorimeter generally uses water as the substance that absorbs energy from the reaction. If the water were replaced by an oil with a lower specific heat capacity than water, how would the temperature change?

• The temperature would increase faster

• The temperature would increase slower

• The temperature would increase the same as water

• What's Specific Heat Capacity?

Tags

NGSS.HS-PS3-4

What measures Kinetic Energy?

• Temperature

• Mass

• Volume

• Heat

Tags

NGSS.MS-PS3-1

When a hot piece of metal is placed in water, the average kinetic energy of the water molecules....?

• Increase

• Decrease

• Stays the same

• Goes up and down

Tags

NGSS.HS-PS3-4

Can energy be created or destroyed?

• yes

• no

Tags

NGSS.MS-PS1-5

NGSS.MS-PS3-5

Which heat capacity would heat up first?

• 0.10 J/gC

• 0.80 J/gC

• 2.13 J/gC

• 1.00 J/gC

Tags

NGSS.HS-PS3-4

If you put 2 objects of different temperatures in contact with each other, what do you predict will happen?

• Nothing

• heat transfer till an thermal equilibrium is reached

• heat transfer till one object has all the thermal energy

• heat transfer till they switch temperatures

Tags

NGSS.HS-PS3-4

If you need a metal that does not heat up in the sun fast, what type of heat capacity should you look for?

• Low heat capacity

• High heat capacity

• Does not matter

• Flip a coin

How many Joules of heat are produced for a cup of water when 10.0g is heated from 20 C to 50 C? (specific heat of water is 4.18 J/gC)

• 1254 J

• 12.54 J

• 0.03 J

• 1.00 J

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

What  is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t

• Q= ½mv

• Q=mc

• m=QC

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 of iron.

• 0.46 J/g^oC

• 2,567,446.875 J/g^oC

• 1.654 J/g^oC

Tags

NGSS.HS-PS3-4