Temperature, thermal energy, and heat capacity

Question 1

What is the formula to convert Celsius to Kelvin?

Answer 1

K = °C + 273.15

This formula is important when performing calculations in thermodynamics, where absolute temperature (Kelvin) is required.

Question 2

What is the Stefan-Boltzmann Law for radiation?

Answer 2

P = σ⋅A⋅T^4

The Stefan-Boltzmann Law calculates the power radiated by an object, where σ is the Stefan-Boltzmann constant, 𝐴 is the surface area, and T is the temperature in Kelvin.

Question 3

What is the formula for heat transfer by conduction?

Answer 3

Q=k⋅A⋅ΔT/d
​

This equation calculates the amount of heat
Q transferred through a material, where k is the thermal conductivity, A is the area, ΔT is the temperature difference, and d is the thickness.

Question 4

What is the formula for heat capacity?

Answer 4

𝐶 =𝑄/Δ𝑇

Heat capacity C represents the amount of heat Q required to raise the temperature of a substance by a unit (i.e, by a degree Celsius or by a Kelvin etc).

Question 5

What is the formula for specific heat capacity?

Answer 5

Q = m⋅c⋅ΔT

This equation calculates the heat Q required to raise the temperature of a mass m of a substance by ΔT, where c is the specific heat capacity.