Course: Thermodynamics in Energy Engineering

The enthalpy changes in common chemical reaction can be calculated. Let’s calculate the heat of chemical reactions. The chemical reaction can be break into formation reactions for the compounds involved, …

If the system is insulated (adiabatic), -10℃ H({2})O((l)) (supercooled liquid) will be transformed to ice + liquid H({2})O at 0℃. Calculate fraction of ice in the final mixture.       Basis …

We can calculate the enthalpy changes at temperatures other than reference temperature by taking a reversible detour. Integration of ({ C }_{ p }) over temperature gives the energy changes …

We can calculate the energy difference between two states of different temperature if we know the heat capacities. When the pressure is constant, integration of ({ C }_{ p }) …

Welcome to Week 2. This week in thermodynamics of energy engineering, we are still talking about the first law of thermodynamics, but we are going be looking at its application …

In this first week, you looked at the definition of the first law of thermodynamics and their physical meaning. The first law is nothing but conservation of energy. The total …

Heat capacity ♦  Temperature dependence of heat capacity      • (C)(p) usually give as (C)(p)=(a)+(bT)+(cT)−(2)+(dT)(2)      • When phase changes → Heat capacity changes abruptly ♦  Pressure dependence of heat capacity      • …

For ideal gases, the relationship between ({C})({p}) and ({C})({v}) is       ({C})({p}) – ({C})({v}) = ({R}) The ideal gases have specific heat capacities       monoatomic ideal gas ∶  ({C})({v}) = (frac{3}{2}) ({R}), …

In dealing with energy balance equations, we often need to calculate energy change upon temperature change. Heat capacity is the thermal energy required to change the temperature of a material, …

In formulating the energy balance equation for the open system, we must consider energy transfer involved with materials in transit. The energy balance equation for the open system is thus …

We have a box which is adiabatic and closed. Pressure outside of box is constant at P. Inside this box, water at 25 ℃ is contained in a cup located …

Besides mechanical work, there are several forms of work in thermodynamic systems. In Solid : generally γ(≠)σ   – Solids can support a certain shear stress   – In solids, atoms cannot …

The pressure in mechanical work or P-V work The magnitude of mechanical work or the P-V work is the force F, multiplied by the displacement dx through which the system …

As a mathematical interpretation on the first law, we can formulate the conservation of energy concept into equations, called energy balance equation. The first and the most simple formulation is …

Before getting into the world of thermodynamics, we need to understand some basic notions and definitions. ■ System The thermodynamic system is any portion of space or materials defined for …