Show:
Vocabulary
Endothermic/Exothermic
Heat Calculations
Phase Calculations
Heating Curve
100

True or False:


Kinetic Energy is the energy due to the position of an object. 

False

100

What is the charge that goes on an endothermic answer?

+ Positive

100

What unit should heat be in?

J (Joules)

100

What unit is heat of fusion/vaporization in?

J/g

100

What unit should your answer be in when calculating the total heat?

J (Joules)

200

True or False:

Temperature and Heat are different. 

True
200

What is the charge that goes on an exothermic answer?

- Negative

200

What is the heat absorbed when 2.0 g of water are heated from 2.0oC to 4.0oC? (c = 4.18 J/goC)


(Include a charge and unit on your answer)

+ 16.72 J

200

When you are boiling, do you use Hf or Hv?

Hv

200

On the heating curve, what does f.p and b.p represent?

freezing point, and boiling point

300

What is the law of conservation of energy? (Most complete answer wins)

1. energy is never created or destroyed

2. energy can be converted from one form to another. 

300

Is a handwarmer exothermic or endothermic?

exothermic

300

What is the heat lost when 20 g of gold is cooled from 50.0 oC to 25.0 oC? ( c = 0.129 J/goC)


(Include a charge and unit on your answer)

-64.5 J

300

When you are freezing do you use Hf or Hv

Hf

300

What formula should you use in the curve when there is a temperature change?

q = mcdeltaT

400

What is the measure of the kinetic energy of particles?

temperature

400

Is an instant icepack endothermic or exothermic

endothermic

400

What unit is specific heat in?

J/goC

400

What is the heat needed to vaporize 26.0 g of Copper? 

(Hf = 205 J/g)

(Hv = 4726 J/g)


(Include a unit on your answer and a charge)

+122876 J

400

How much heat does it take to warm 15.0 g of water from -10oC to 150oC? 

Cice = 2.06 J/goC

Cwater = 4.18 J/goC

Csteam = 2.02 J/goC

Hf = 334 J/g

Hv = 2260 J/g

+47004 J

500

What device is used to measure heat?

calorimeter

500

Is photosynthesis exothermic or endothermic?


(THIS ONE IS 2x the points)

endothermic

500

Calculate the mass needed to heatl 628 J of iron from 10.0oC to 20.0oC? (c = 0.448 J/goC)


(Include a unit on your answer)

140.2 g

500

What is the heat needed to freeze 4.0 g of Copper? 

(Hf = 205 J/g)

(Hv = 4726 J/g)


(Include a unit on your answer and a charge)

- 820 J

500

How much heat must be released to cool 12.0 g of steam to -5.0 oC?  

Cice = 2.06 J/goC

Cwater = 4.18 J/goC

Csteam = 2.02 J/goC

Hf = 334 J/g

Hv = 2260 J/g

- 36268 J