Calorimetry

For the formula:

Q= m x c x ∆T

The units for specific heat are:

• g /cal x °C

• °C/g x cal

• cal/g

• cal/g x °C

What is the name of the instrument used to measure the amount of heat given off by a chemical reaction?

• calorimeter

• calorie

• can

• none of these

Tags

NGSS.HS-PS3-4

The specific heat of water is 1 cal/g°C.

If 43.1 cal of energy is added to 6.20 g of water at 18.0 °C, what is the final temperature of the water?

• 6.95 °C

• -11.1 °C

• 19.8 °C

• 25.0 °C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

What does "ΔT" mean?

• A change in health

• A change in heat

• A change in height

• A change in temperature

Tags

NGSS.HS-PS1-5

The unit Joules is for measuring

• heat energy

• temperature

• specific heat

Tags

NGSS.HS-PS3-4

If ...

m= 4.0 g,

c = 1 (cal/g°C)

∆T = 4.0 °C,

calculate Q.

• 1.6 cal

• 8 cal

• 16 cal

• 1 cal

Tags

NGSS.HS-PS3-1

"The process of measuring the amount of heat released or absorbed in a chemical reaction" is called...

• combustion

• convection

• calories

• calorimetry

Tags

NGSS.HS-PS3-4

You perform a calorimetry experiment. You notice you have:

10 g of water

c (of water) = 1 (cal/g °C)

ΔT = 8.0 ⁰C

how many calories are in the cheeto?

• 7 cal

• 8 cal

• 80 cal

• 0.8 cal

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

In an exothermic reaction …….

• heat energy is given out

• heat energy is taken in

• nothing happens

• don't know????

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

In an Endothermic Reaction.....

• nothing happens

• I don't know!!!

• Heat Energy is given out

• Heat Energy is taken in