Heat and Temperature Flashcards
1
Q
0th Law of Thermodynamics
A
If A and B are in thermal equilbrium with C. Then A and B are in thermal equilibrium with each other
2
Q
When does thermal equilibrium take place
A
When 2 systems have the same temperature
3
Q
Linear Expansion Equation
A
- ∆L=αL∆T
- ∆L is change in length
- α is coefficient of linear expansion
- L is original length
- ∆T is the temperature change
∆T < 100K and for 1 dimension
4
Q
Volume Expansion Equation
A
- ΔV= βVΔT
- ΔV is change in volume
- β is the coefficient of volume expansion
- V is the original volume
- ΔT is the change in temperature
5
Q
Volume and Linear Expansion coefficient relation
A
β = 3α
6
Q
Specific Heat Capacity Equation
A
- Q=mcΔT
- Q is the energy required to change the temperature
- m is the mass
- c is the specific heat capacity
- ΔT is the change in temperature
7
Q
Latent Heat Equation
A
- Q = mL
- Q is the energy required to change phase
- m is the mass
- L is the specific latent heat
8
Q
Conduction Heat Transfer Equation
A
- (dQ/dt) = κA (dT/dx)
- dQ/dt is the heat flow
- κ is the thermal conductivity
- A is the cross sectional area of the rod
- dT/dx is the temperature gradient
9
Q
Radiation Heat Transfer Equation
A
- (dQ/dt) = AϵσT^4
- dQ/dt is the heat flow/power
- A is the area of the emitting surface
- ϵ is the surface emissivity
- σ is the Stephan Boltzmann constant
- T is the Temperature of the surface
