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Thermodynamics

entropy in thermodynamics

The concept of entropy was introduced into the study of thermodynamics by Rudolph Clausius in 1856 to give a quantitative basis for the second law. It provides another variable to describe the state of a system to go along with pressure, volume, temperature and internal energy. If a system undergoes a reversible process during which it absorbs a quantity of ...

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Heat and temperature difference

The difference between heat and temperature is that:Heat is the form of energy that transfer from hot body to cold body.Its unit is joule.While the temperature is the degree of hotness and coldness of the body.Its SI unit is kelvin. Difference between heat and temperature in tabular form Heat Temperature Heat is a form of energy that can transfer from ...

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Difference between conduction,convection and radiation

There are three modes of heat transfer,conduction,convection and radiation.In the process of conduction heat transfer from hot body to cold body due to free electrons.In convection heat transfer due to actual movement of molecules,While in radiation heat transfer in the form of electromagnetic waves. There are three different ways of heat transfer.If you learn difference between conduction,convection and radiation,then you ...

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Conduction heat transfer examples and applications

convection heat transfer Radiation heat transfer “The mode of transfer of heat by vibrating atoms and free electrons in solids from hot to cold parts of a body is called conduction of heat.” The handle of the metal spoon held in hot water soon gets warm. But in case of a wooden spoon, the handle does not get warm. Both ...

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Thermal conductivity:Definition,formula,examples and applications

“The rate of flow of heat across the opposite faces of a meter cube of a substance maintained at a temperature difference of one kelvin is called thermal conductivity of that substance.” Thermal conductivity equation Conduction of heat occurs at different rates in different materials.In metals, heat flows rapidly as compared to insulators such as wood or rubber.Consider a solid ...

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Difference between reversible and irreversible process in thermodynamics

Reversible process in thermodynamics “A process which can be retracted in exactly reverse order without producing any change in the surroundings is called reversible process”. In the reverse process, the system passes through the same stages as in the direct process but thermal and mechanical effects at each stage are exactly reverse. If heat is absorbed in the direct process, ...

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kelvin temperature scale with formula and examples

How to convert Kelvin to degrees Celsius? Temperature on Celsius scale can be converted into kelvin by subtracting 273 from the temperature in Kelvin scale. Kelvin to Celsius formula  C = T (k) – 273 Kelvin to ºC example problems Convert 300 kelvin to ºC Solution: T = 300 k Formula:       C = T (k) – 273 C = ...

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Celsius to kelvin conversion formula with examples

How to convert degrees  celsius to kelvin The temperature on kelvin scale can be converted by adding 273 in the temperature Which is in degree centigrade C on Celsius scale.Its formula is given as:          T (k) = 273 + C 0 ºC to kelvin C = 0 ºC As   T = 273 + C T = ...

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Difference between latent heat of fusion and latent heat of vaporization

Latent Heat of Fusion Definition Heat energy required to change unit mass of a substance from solid to liquid state  at its melting point without change in its temperature is called its latent heat of fusion. When a substance is changed from solid to liquid state by adding heat, the process is called melting or fusion. The temperature at which ...

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What is convection current?|Definition,examples and applications

  The upward and downward movement of molecules of water or air is called a convection current. What is Atmospheric Convection? Atmospheric convection plays a fundamental role in determining the global climate patterns and in our daily weather variations.Gliders pilots and condors alike seek the convection thermals that ,rising from the warmer Earth beneath,keep them aloft.Huge energy transfers take place ...

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