Home » Thermodynamics (page 2)

Thermodynamics

Second law of thermodynamics entropy equation examples and applications

Second law of thermodynamics definition First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about the conditions under which this conversion takes place. The second law is concerned with the circumstances in which heat can be converted into work and direction of flow of heat. Before initiating the ...

Read More »

Internal energy formula physics and examples

what is internal energy? “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 ...

Read More »

What is the difference between evaporation and boiling?

Meaning of evaporation in science “Evaporation is the changing of a liquid into vapours (gaseous state) from the surface of the liquid without heating it.” Take some water in a dish.The water in the dish will disappear after some time.It is because the the molecules of water are in constant motion and possess kinetic energy.Fast moving molecules escape out from ...

Read More »

Thermal radiation heat transfer:definition and examples

Conduction of heat convection of heat Radiation heat transfer What is radiation? “Radiation is the mode of transfer of heat from one place to another in the form of waves called electromagnetic waves.” Our sun is the major source of heat energy.But how does this heat energy reach the earth?It reaches us neither by conduction nor by convection,because the space ...

Read More »

convection heat transfer examples and applications

Radiation of heat Conduction of heat Convection of heat definition “Transfer of heat by actual movement of molecules from hot place to a cold place is known as convection.” Liquids and gases are poor conductors of heat.However,heat is transfer through ¬†fluids(liquids or gases)easily by another method called convection. Why a balloon inflated with hot shown in figure .rise up?a liquid ...

Read More »

Conduction of heat transfer with examples and applications in daily life

Conduction heat transfer convection heat transfer Radiation heat transfer Conduction of heat transfer definition “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 metal spoon held in hot water soon gets warm.But in case of a wooden spoon,the handle ...

Read More »

What are the three modes of heat transfer?

What are three types of heat transfer? “when two bodies at different temperature are in thermal contact with each other,thermal energy from a hot body flows to a cold body in the form of heat.This is called heat transfer.” Transfer of heat is a natural process.It continues all the time as long as the bodies in thermal contact are at ...

Read More »

Temperature Conversion scales formulas examples

What are different scales of temperature? There are three different scales of temperature,which are given in the list: Celsius scale Fahrenheit scale Kelvin scale   1.Temperature Conversion from Celsius to Kelvin scale: The temperature T on kelvin scale can be obtained by adding 273 in the temperature C on Celsius scale.Thus the formula to convert Celsius to kelvin is given ...

Read More »

Different types of thermometers and their uses with pictures

Definition of thermometer “Thermometer is the device which is used to measure the temperature of a body.”Some substances have property that changes with temperature.Substances that show a change with temperature can be used as a thermometric material.For example,some substances expand on heating,some change their colors,some change their electric resistance ,etc.Nearly all the the substances expand on heating.Liquids also expand on ...

Read More »

What are different scales of temperature?

Different types of thermometer¬† What is temperature in physics? “The temperature of a body is the degree of hotness or coldness of the body.”or “Average kinetic energy of atoms or molecules.”When we touch a body,we feel it hot or cold.The temperature of a body tells us how hot or cold a body is. When two systems are in thermal equilibrium,we ...

Read More »