Physics Year 10 Flashcards
What is the definition of specific heat capacity?
Specific heat capacity is the amount of heat energy required to raise the temperature of one kilogram of a substance by one degree Celsius.
True or False: Specific heat capacity is the same for all materials.
False
Fill in the blank: The unit of specific heat capacity is ______.
Joules per kilogram per degree Celsius (J/kg°C)
Which material has a high specific heat capacity: water or iron?
Water
What happens to the temperature of a substance when it absorbs heat energy?
The temperature of the substance increases.
Multiple Choice: Which of the following has the highest specific heat capacity? A) Sand B) Water C) Copper
B) Water
What is the specific heat capacity of water?
Approximately 4.18 J/g°C
True or False: A substance with a low specific heat capacity heats up quickly.
True
What is the effect of specific heat capacity on climate?
Areas near large bodies of water have milder climates due to the high specific heat capacity of water.
Fill in the blank: The formula for calculating heat energy is Q = mcΔT, where Q is ______.
the heat energy absorbed or released
What is the process called when a solid changes directly to a gas?
Sublimation
True or False: During melting, a substance’s temperature remains constant.
True
Fill in the blank: The temperature at which a liquid turns into a gas is called its ______.
boiling point
What is the term for the change of state from gas to liquid?
Condensation
Which of the following is an example of freezing? a) Water to ice b) Ice to water c) Water to steam
a) Water to ice
What happens to the particles in a substance during evaporation?
They gain energy and move apart.
True or False: The boiling point of a substance changes with atmospheric pressure.
True
What is the change of state from liquid to solid called?
Freezing
Define ‘latent heat’.
The amount of heat energy required to change the state of a substance without changing its temperature.
Multiple Choice: Which state of matter has a definite shape and volume? a) Solid b) Liquid c) Gas
a) Solid
What is gas pressure?
Gas pressure is the force exerted by gas molecules colliding with the walls of their container.
True or False: Increasing the temperature of a gas at constant volume increases its pressure.
True
Fill in the blank: The relationship between pressure and volume of a gas at constant temperature is described by _____ Law.
Boyle’s
What happens to the volume of a gas when the pressure is increased at constant temperature?
The volume decreases.
Multiple Choice: Which of the following laws relates pressure and temperature in a gas? A) Boyle’s Law, B) Charles’ Law, C) Gay-Lussac’s Law
C) Gay-Lussac’s Law
What is the effect of increasing the volume of a gas at constant temperature on its pressure?
The pressure decreases.
True or False: Charles’ Law states that the volume of a gas is directly proportional to its temperature at constant pressure.
True
Fill in the blank: The absolute temperature must be used in gas law calculations, measured in _____.
Kelvin
What is the formula for Boyle’s Law?
P1V1 = P2V2
Multiple Choice: When the temperature of a gas is doubled at constant volume, what happens to the pressure? A) It halves, B) It doubles, C) It remains the same
B) It doubles
