WorksheetsUnderstanding Calorimetry
Total questions: 4
Worksheet time: 15mins
1-12.
Answer the questions below after watching the video
What does the heat capacity of a substance indicate?
The volume of the substance that can absorb heat
The amount of energy needed to raise the temperature of a sample by 1°C
The time it takes for a substance to cool down
The temperature increase when heat is applied
How is specific heat different from heat capacity?
Specific heat is measured in grams instead of kilograms
It's the energy required to raise 1 gram of a substance by 1°C
Specific heat is a measure of volume, not temperature
There is no difference; they are the same
What equation relates heat exchange to specific heat?
Heat exchange = Specific heat x Mass of substance x Temperature change
Heat capacity = Specific heat / Temperature change
Heat exchange = Heat capacity x Temperature change
Specific heat = Heat exchange / (Mass of substance x Temperature change)
Why is a coffee cup used in calorimetry experiments?
Coffee cups are cheap
Because it's readily available
It acts as a good insulator
It can measure temperature accurately
What is the primary goal of the coffee cup calorimeter experiment?
To measure the heat capacity of the coffee cup
To find the boiling point of the metal
To determine the temperature of boiling water
To calculate the specific heat of a metal
What is the purpose of heating the metal in boiling water before the experiment?
To increase its mass
To make it easier to handle
To ensure it's at a known temperature
To clean the metal
How do you calculate the mass of water in the coffee cup calorimeter experiment?
By weighing the cup before and after adding water
Using the density of water
Equating the volume of water in milliliters to mass in grams
Measuring the displacement of water
What does the heat absorbed by the water represent in the experiment?
The final temperature of the metal
The heat released by the metal
The temperature change of the water
The specific heat of the water
How can the specific heat of the metal be determined?
By dividing the heat absorbed by the water by the mass of the metal
Using the heat absorbed by the water and the temperature change of the metal
Through the temperature change of the water only
Calculating the difference in temperature between the metal and water
Why is specific heat important for identifying metals?
Specific heat is related to the metal's weight
It determines the metal's color
It measures the metal's conductivity
Because it's unique to each metal
A 4.82 g sample of an unknown metal is heated to 115.0°C and then placed in 35 mL of water that has a temperature of 28.7°C, which then heats up to 34.5°C.
With water having a specific heat of 4.186 J/g⋅°C, what is the heat of water absorbed by the water?
(Hint: units and sig figs)
(a)
A 4.82 g sample of an unknown metal is heated to 115.0°C and then placed in 35 mL of water that has a temperature of 28.7°C, which then heats up to 34.5°C.
Using the heat absorbed by the water, calculated in the previous problem, the specific heat of the unknown metal is calculated to be (a) J/g⋅°C.
(Hint: sig figs)
The video indicates that the specific heat is given by the symbol "s". However, we use the symbol "c" for specific heat. Which of the following equations is the equation we will use for specific heat?
q = mcΔV
q = mcΔP
q = mcΔE
q = mcΔT
