Home » Thermodynamics (page 2)

Thermodynamics

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 = ...

Read More »

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 ...

Read More »

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 ...

Read More »

Carnot engine and carnot cycle with examples and problems

Carnot Engine Sadi Carnot in 1840 described an ideal engine using only isothermal and adiabatic processes.The carnot engine is free from friction and heat loses. Sadi showed that a heat engine operating in an ideal reversible cycle between two heat reservoirs at different temperatures would be the most efficient. Construction of carnot engine: It consists of following parts: A cylinder ...

Read More »

3 types of intermolecular forces with examples

What are intermolecular forces? Forces between molecules are of electromagnetic origin.All molecules contain electric charges in motion.These molecules are electrically neutral in the sense that the negative charge of the electron is equal and opposite charge to the positive charge of the nuclei.This does no mean,however that the molecules do not interact electrically.For example when two  molecules approach each other ...

Read More »

Difference between specific heat capacity and heat capacity

Specific Heat Capacity definition Specific heat of a substance is the amount of heat required as raise the temperature of 1 kg mass of that substance through 1 K. Specific heat formula Generally, when a body is heated, its temperature increases. Increase in the temperature of a body is found to be proportional to the amount of heat absorbed by ...

Read More »

thermal Expansion:Formula,examples and applications

Thermal expansion definition Most of the substances solids, liquid and gases expand on heating and contract on cooling. Their thermal expansions and contractions are usually small and are not noticeable. However, these expansions and contractions are important in our daily life. The kinetic energy of the molecules of an object depends on its temperature. The molecules of a solid vibrate ...

Read More »

First law of thermodynamics:Definition,examples and applications

1st law of thermodynamics definition When heat is added to a system there is an increase in the internal energy due to the rise in temperature,an increase in pressure or change in the state.If at the same time,a substance is allowed to do work on its environment by expansion,the heat Q required will be the heat necessary to change the ...

Read More »

Second law of thermodynamics:Statement,examples and applications

Second law of thermodynamics states that heat can flow spontaneously from a hot object to a cold object; heat will not flow spontaneously from a cold object to a hot object. Why we need  2nd law of thermodynamics? The first law of thermodynamics  would not be violated if any of these processes occurred in reverse. To explain this lack of reversibility ...

Read More »

Internal energy formula physics and examples

“The sum of all forms of molecular energies (kinetic and potential ) of a substance is termed as its internal energy.”In the study of thermodynamics,usually ideal gas is considered as a working substance. the molecules of an ideal gas are mere mass points which exert no force on one another. so the internal energy of an ideal gas system is ...

Read More »