Dirst Flashcards
What is heat capacity?
Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius.
True or False: Heat capacity is an intensive property.
False: Heat capacity is an extensive property.
What is the formula for calculating heat capacity (C)?
C = Q / ΔT, where Q is the heat added and ΔT is the change in temperature.
Fill in the blank: The heat capacity of a substance depends on its _____ and _____ state.
mass; phase
What is specific heat capacity?
Specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.
Which has a higher specific heat capacity: water or iron?
Water
True or False: The specific heat capacity of a substance can change with temperature.
True
What is the unit of heat capacity?
Joules per degree Celsius (J/°C)
Multiple Choice: Which of the following has the highest specific heat capacity? A) Air B) Water C) Copper D) Sand
B) Water
What is the relationship between heat capacity and temperature change?
Heat capacity is directly proportional to the amount of heat added and the resulting temperature change.
Fill in the blank: The heat capacity of a solid typically _____ as temperature increases.
increases
What is molar heat capacity?
Molar heat capacity is the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius.
True or False: Heat capacity is the same for all phases of a substance.
False
What is the heat capacity of water in J/(kg·°C)?
Approximately 4184 J/(kg·°C)
Multiple Choice: Which factor does NOT affect the heat capacity of a substance? A) Mass B) Temperature C) Color D) Phase
C) Color
What is the heat capacity of a 2 kg substance that absorbs 1000 J of heat and experiences a temperature change of 5 °C?
Heat capacity is 40 J/°C.
Fill in the blank: The specific heat capacity of metals is generally _____ than that of water.
lower
What is the significance of high specific heat capacity in water?
It helps regulate the Earth’s climate and maintain stable temperatures in aquatic environments.
Multiple Choice: Which of the following substances would have the highest heat capacity? A) Lead B) Water C) Mercury D) Aluminum
B) Water
True or False: Heat capacity is useful for understanding thermal properties of materials.
True
What happens to heat capacity as the mass of a substance increases?
Heat capacity increases with the mass of the substance.
What is the difference between heat capacity and thermal conductivity?
Heat capacity measures how much heat energy a substance can store, while thermal conductivity measures how quickly heat can pass through a substance.
Fill in the blank: The heat capacity of gases is generally _____ than that of liquids and solids.
lower
What is the equation for calculating the change in heat (Q) using specific heat capacity?
Q = mcΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature.
