Course: Thermodynamics in Energy Engineering

Example : In a gas-spring system An ideal gas is contained in a cylinder. Initially the pressure, volume and temperature were P1, V1, and T1. A spring with a spring …

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 }) …

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 …

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 …

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      • …

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 …

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 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, …

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}), …

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 …

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 …

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 …

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 …

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 …

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 …