What is the mass that comes from living things called?
Biomass
100
A block of Aluminum has a volume of 15 cm³ and weighs 40g. What is the density?
2.66 g/cm³
100
17. A device used to measure Calories is called a ___________
a. Thermometer
b. Balance
c. Calorimeter
d. Triple beam balance
C. Calorimeter
200
Cal= M X ΔT x spht
In the equation above, what does M stand for?
Mass
200
What is the formula for Δ M?
Mᶠ - Mˢ
200
If you have 30 mL and the temperature went from 20 to 50 degrees, how many calories are needed?
900 cals
200
If the density of lead is 11.4 g/cm³ and it has a volume of 25 cm³, what is the mass?
285g
200
Water cooled from 85 to 30 degrees C. What is the ∆T?
a. -55
b. 55
c. 45
d. 65
55
300
What does spht stand for?
Specific Heat
300
Is heat gained or lost if the temperature changes from 86 degrees to 64 degrees, and by how much?
22 degrees
300
A sample of Biomass gives off 2350 Calories. How many Food Calories is that?
a. 235
b. 2.35
c. 23.5
d. .2350
b. 2.35
300
An object as a density of 1.45g/cm3. When placed in water, it will______
a. Float
b. Sink
c. Explode
d. Freeze
300
What is the formula to find density?
Density = Mass ÷ Volume
400
What’s the specific heat of water?
1
400
If the mass of a product starts at 1.1 and ends at .2 what is the Δ M?
0.9
400
What is the cal/ g of an object placed in 30 ML of water that had a temperature that went from 20 to 40 degrees, and a ΔM that is 0.55?
1090.9
400
The Density of an object________ when it is heated.
a. Decreases
b. Increases
c. Stays the same
B. Decreases
400
A block of lead is 4.5cm by 5cm by 6cm. The block weighs 1550g. What is its density?
a. 11.48g/cm3
b. 114.8g/cm3
c. 0.08g/cm3
d. .8g/cm3
a. 11.48g/cm3
500
If you have 50 mL of water and you heat it from 30 to 70 degrees, how many Calories are needed?
2,000 calories
500
If a room changes temperature from 72 degrees to 66 degrees it the heat lost or gained, and by how much?
6 degrees, lost
500
Substance “A” weighs 50 grams.The temperature of substance “A” changes from 20 to 80 degrees. The specific heat of Substance “A” is .75. How many Calories were used to heat substance “A”?
2250 cal
500
25. The Mass of an object _________ when it is heated.
a. Increases
b. Decreases
c. Stays the same
c. Stays the same
500
A rock is dropped into a graduated cylinder containing 25mL of water. After the rock is dropped in, the volume reads 35mL. The rock has a mass of 25g. What is its density?
a. 1g/cm3
b. 1.4g/cm3
c. .4g/cm3
d. 2.5g/cm3