Thermodynamics Flashcards
What is heat?
Form of energy
What is heat measured in?
joules
What is temperature measured in?
Celsius
T or F: Heating an object up slows down its particles
False
T or F: Particles are in constant motion
true
Fill in the blank: Kinetic Energy + ____ = Internal Energy
Potential Energy
T or F: Metals transfer heat quickly
True
Name the 3 variables affecting temperature change
Mass, Material, amount of heat
What is 1C in Kelvin?
274K
Name the 3 types of heat transfer
Conduction, Convection, Radiation
T or F: Convection heat transfer happens through touch
false
What are the 2 variables affecting radiation absorbtion
Material, Surface Area
What is the main type of radiation?
Infra-red
Which type of heat transfer can travel through a vacuum.
Radiation
What is Specific Heat Capacity
The amount of energy needed to raise 1kg of material by 1C
What does this equation represent? Q=MC△T
Energy in a change of temperature of an object
What does Q stand for in: Q=MC△T
Total energy
What does △T stand for in: Q=MC△T
Change in temperature
What is M measured in for this equation: Q=MC△T
Kilograms
What is Heat Capacity measured in for this Equation: Q=MC△T
J/Kg
What is Latent Heat?
The amount of energy needed for 1Kg of an object to change state (Gas, Liquid, Solid)
T or F: There is no temperature change during a state change (Gas, Liquid, Solid)
True
What is the equation for a change in state
E = M*L
What is L measured in for this equation: E=M*L
J/Kg
What are the 4 factors affecting evapouration
Volatility, Surface Area, Humidity, Air Movement
How does Volatility affect rate of Evaporation
The stronger the surface bonds, the lower the rate of evaporation
What is the Zeroth Law of Thermodynamics
If 2 different systems are in equilibrium with a 3rd, they are all in equilibrium
What is the equation for transference of heat between 2 systems
-Q = Q or -(MC△T) = MC△T
What is a system in relation to thermodynamics
A collection of objects being studied
What is the 1st Law of Thermodynamics
△U = Q - W or Change in internal energy equals transferred heat energy minus work energy
What does W stand for in this equation: △U = Q - W
‘Work’ or lost energy
