## Heat and Work [Fully Explained with Interrelationship]

Heat and Work Both heat and work refer to processes by which energy is transferred to or from a substance. What is Heat When energy is exchanged between thermodynamic systems by thermal interaction, the transfer of energy is called heat. The units of heat are therefore the units of energy,…

## Pure substance and two property rule

Let we first go through the definition of pure substance to understand its meaning. “A pure substance is defined as one that is homogeneous and invariable in chemical composition throughout its mass” To understand the definition let us first we understand the meaning of the word homogeneous. The word homogeneous…

## Quasi static process in thermodynamics

Quasi static process is a thermodynamic process which is generally used to determine actual path followed by the process while changing its state. To understand this topic in deep first we should understand the meaning of the word ‘Quasi’. Meaning of ‘Quasi’ is ‘almost’. So, the meaning of ‘Quasi static’…

## Characteristics of an ideal working fluid in vapour power cycles

We all know any thermodynamic power cycle depends on some working fluid for the transfer of heat from source to the point where it is converted to some useful work. Picking a working fluid for any vapour power cycle is not a random decision, since in case of any malfunction…

## Availability and dead state of a thermodynamic system

When a system is not in equilibrium (or dead state in this case) with its surroundings there is an opportunity in convert this departure from equilibrium to some useful work. For example, if there is a difference between the temperature of system and surroundings then this temperature difference can be…

## Specific heat and latent heat

Specific heat Specific heat is defined as the amount of heat required to raise the temperature of one kg substance by one degree Kalvin. The value of specific heat (c) is obtained by following equation  c = Q/ (m* Δt) J/kg K Where Q is amount of heat transfer in…

## Path function and point function

A brief discussion on path function and point function For solving problems based on Thermodynamics, knowledge of path function and point function is necessary. Hence it is necessary for a student to understand this concept properly. Path function A Path function is a function whose value depends on the path…

## Thermodynamic property, process and cycle

Thermodynamic property A thermodynamic property is a state variable whose value defines a state of the system for e.g. pressure, temperature, and volume. Thermodynamic properties are macroscopic in nature. When these values are constant, the system is said to be in a definite state. Thermodynamic properties are generally divided into…