Question

what is meant by thermodynamics?

Answer 1

@Mashy

Answer 2

@aayushi.somani

Answer 3

thx 4 having a look

Answer 4

hydrocarbons are the compounds which r entirely made of hydrogen and carbon. eg: diamond, graphit etc..

Answer 5

did u changed the question?? i answered hydrocarbons.!!

Answer 6

no!

Answer 7

ahh u asked hydrocarbons right?

Answer 8

no dr why will i tell lies.
its ok . happens sometime

Answer 9

okay i'll tell u the definition of thermodynamics..!

Answer 10

A branch of physics that deals with the concepts of heat and temperature and the inter conversion of heat and other forms of energy. it is a macroscopic science.

Answer 11

what do u mean by macroscopic

Answer 12

it means that it deals with the bulky substance and doesnot go into the molecular constitution of matter..

Answer 13

can u tell me what is extensive property?

Answer 14

the type of properties which indicate the size of the system.. like :internal energy

Answer 15

and intensive?

Answer 16

they donot indicate the size of the system they remain uchanged for a system in equillibrium

Answer 17

then what temperature?

Answer 18

it determines the direction of flow of heat when 2 bodies r placed in thermal contact.. or simply it is the measurement of hotness or coldness of a body

Answer 19

i meant which property is it?

Answer 20

temperature is an intensive property

Answer 21

but if it increases then volume of gas will increase

Answer 22

but this property doesnot indicate the size.. this is vol. which indicate the size and not temp.

Answer 23

what r state variables?

Answer 24

every equilibrium state of a thermodynamic system is completely described by specific values of macroscopic variables.. these variables r state variables.. these define the equilibrium state of the system

Answer 25

what should i start with tell me from where ever u want to..!

Answer 26

start with basic definitions like i asked u

Answer 27

okay.. do u know what is heat?

Answer 28

heat is a form of energy

Answer 29

@aayushi.somani not teaching?

Answer 30

earlier heat was thought to be a fluid.. but then later scientist proved that it was not a liquid while it is a form of energy.. Benjamin thomos in 1798 found the caloric picture of heat..

Answer 31

ok next then

Answer 32

thermodynamic equilibrium-it is that state of the system when the macroscopic variables that characterise the system donot change with time

Answer 33

they do not change with respect to time
correct?

Answer 34

yeah.. now there is zeroth law... i guess u know this?

Answer 35

no

Answer 36

see the statement is-- if 2 systems r in thermal equilibrium with a third system then they r in thermal equilibrium with each other

Answer 37

here if system A and B r in thermal eq. with C then they r in thermal eq with each other..

Answer 38

ok for example
anything live

Answer 39

if two systems of ideal gases are in equilibrium, then P1V1/N1 = P2V2/N2 where Pi is the pressure in the ith system, Vi is the volume, and Ni is the amount (in moles, or simply the number of atoms) of gas.

Answer 40

ok next

Answer 41

u know what is thermometry and calorie?

Answer 42

no

Answer 43

thermometry is the study of temp. and 1Calorie is the amount of heat req. to raise the temp. of 1g of water from 14.5 degree C to 15.5 degree celcius

Answer 44

@aayushi.somani

Answer 45

yeah ?

Answer 46

what is internal energy?

Answer 47

it is the sum of molecular kinetic and potential energy

Answer 48

how is mass equivalent to energy?

Answer 49

@aayushi.somani

Answer 50

@aayushi.somani

Answer 51

@Mashy

Answer 52

Mass is equivalent to energy in Einstein's famous equation
\[e=mc^2\]
Where e is energy, measured in joules, m is mass measured in kilograms, and c is the speed of light, measured in meters per second (the speed of light is 299,792,458 meters/second)

Answer 53

@halorazer thx