The first law- conservation of energy
This video highlights the first law of thermodynamics, the conservation of energy. The first law of thermodynamics is the energy principle. It states that the energy is nether created or …
Course: Thermodynamics in Energy Engineering
The week ahead
Welcome to Week 1 of the course. During this first week, we introduce the first law of thermodynamics and derive the equations describing the first law. To demonstrate the usefulness …
Wrapping up: Farewell
Thank you for taking this course. I hope that you have enjoyed it.During this six-week course, we have reviewed the three laws of thermodynamics that govern the behavior of energy. …
Summary of Week 6
This final week, you examined at the power of property relations in deriving various property changes upon other parameter changes. Thermodynamic properties such as temperature, pressure, volume and entropy are …
Thermoelastic for solid example
Estimation of the numerical thermoeleastic effect of a solid To solid iron (Fe) at 298 K, stress of 10,000 psi (≡6.9 x 107 N/m2) was applied. Calculate the temperature change …
Example for ideal gases
Examples The pressure of an ideal diatomic gas at 300 K changes from 1 atmto 10 atmadiabatically and reversibly. What is the final temperature? For isoentropicprocess of ideal gases (adiabatic …
Entropy of mixing
In this video, we focus our attention to derive entropy of mixing for ideal gases. Since the molecules of ideal gases do not interact, we can spilit the mixing of …
Thermoelastic effect
Thermoelastic effect is the temperature change resulting from stretching or contracting of an elastic material. The temperature change in this case can be calculated mathematically from the stress dependence of …
Isoentropic P-T relation
We have derived the equation of state of an ideal gas under adiabatic reversible changes in week 2(‘Equation of state for adiabatic, reversible changes of ideal gases’). The equation of …
Heat capacity and entropy
Heat capacity can be defined not only from heat but also from entropy function.
Cp vs. P
In week 1 article(‘T_ P dependence of heat capacity’), pressure dependence of heat capacity is ignorable in most cases while the temperature dependence is significant. However, heat capacity strongly depends …
Internal energy and enthalpy of ideal gases depend only on temperature
The internal energy and enthalpy of ideal gases depends only on temperature, not on volume or pressure. We can prove these property of ideal gases using property relations. From the …
Thermal expansion coefficient: derivation of relationship between linear expansion and volume expansion
({ alpha }_{ L }) VS ({ alpha }_{ V }) In calculating entropy change for a solid under isothermal pressure change, we used thermal volume expansion coefficient (({ alpha …
Summary of week 5
This week you looked at the free energy functions. You can determine the reversibility of the process by looking at the total entropy change. However, information on the surrounding is …
The week ahead
Welcome to the Last week of the course. During this final week, we focus our attention to applying property relations to various situations to demonstrate their usefulness. Thermodynamic properties such …