Internal Energy
Internal Energy is measured in .....
Joule
The official SI Unit of Temperature
Kelvin
Heat is a ................. quantity
Scalar
Boyle's law is about Isobaric, Isochoric, or Isothermal gas transformation?
Isothermal
Change in T = 40 Celisus degree, coefficient: 12×10−6°C^−1 , Original length=2m, find the change in length.
0.00096m=0.96cm
Is Internal Energy a scalar or a vector quantity?
Scalar
300 F are equal to how many Celsius degrees?
148.89 Celsius degrees (approx)
The SI Unit of Heat is
Joule
In an Isochoric transformation, pressure (changes / is constant)
changes
How does the coefficient of linear expansion (α\alphaα) and the coefficient of area expansion (β\betaβ) are related?
β = 2α
What is Internal Energy?
The Sum of KE+PE of all the particles that form a body
What is Temperature?
The Average Kinetic Energy of particles forming a body
Like Internal Energy, Heat can also be named ....
Thermal Energy
When a gas tranformation is Isothermal ..... is constant
Temperature
A metal plate with an initial area of 100 cm² expands due to heating. If the coefficient of area expansion is 1.5×10^−5 °C and the temperature increases by 50°C, what is the change in the area of the plate?
ΔA=0.075cm2
2 cups of coffee (a and b) contain the same mass (and same type) of coffee, but in the first T=80C while in the second T=60C. Which has the lowest Internal Energy?
The second
Unlike Internal Energy, what happens to the Temperature if the mass increases?
Remains the same
Unlike Internal Energy, Heat is ............ (and not stored)
transfered
An Isobaric trasformation (at p=2 kPa), the heated Volume of a gas increases from 2 m^3 to 9 m^3. Find the Work done
Work done = 14000 J (or 14 kJ)
If the volume of a gas increases by 10% when the temperature is raised by 30°C at constant pressure, what is the coefficient of volume expansion (γ\gammaγ) for the gas?
γ=0.00333°C^−1.
If the Temperature increases, what happens to Internal Energy?
It increases as well
Can 2 objects in contact, and at the same temperature, transfer thermal energy?
No, because they have reached equilibrium
What is Heat?
Thermal energy transfered from a body to another or 2 regions of the same body
What is the name of the Thermodynamic transformation in which Work=0 J?
Isochoric (Constant Volume)
Why do railroads leave gaps between railway tracks, and how is this related to thermal expansion?
Because during summer the temperature is higher and they tend to expand.