chapter 12 - thermodynamics - formulae

8/10/2019 Chapter 12 - Thermodynamics - Formulae

1/5


2/5

=. I "#e e>%"io !or "#e Firs" L%& o! T#er'o()%'i*s- "#e

>%"i"ies o +o"# "#e si(es %re ex"esive. T#e pro(*" o! %

i"esive v%ri%+$e $i,e P %( % ex"esive >%"i") 5 is ex"esive.Q = U + !

?. Give expressio !or "#e &or, (oe +) % 7%s i % iso"#er'%$

pro*ess.

W = n%" ln )!*!(

-%

W = n%" ln )(*

@. Give expressio !or "#e &or, (oe i % iso+%ri* pro*ess.

W = n% )"*' "(

1. De!ie "#e e!!i*ie*) o! % #e%" e7ie 9B;.

= WQ(

where, Q(is the heat input or the heat absorbed by the system in one

complete cycle.

11. I % *)*$e- % *er"%i %'o" o! #e%" 92; '%) %$so +e ree*"e( +) "#e

s)s"e' "o "#e srro(i7s. I s*# *ir*'s"%*es- %" is "#e

e!!i*ie*) o! "#e #e%" e7ie/

= ( ' Q*Q(

12. Give expressio !or "#e *oe!!i*ie" o! per!or'%*e 9; o! %

re!ri7er%"or.

/ = Q*W

where,

Q*is the heat e0tracted from the cold reservoir

W is the work done on the system, i.e. the refrigerant

10. Give expressio !or "#e *oe!!i*ie" o! per!or'%*e o! % re!ri7er%"or

*


3/5

i "er's o! "#e #e%" ex"r%*"e( !ro' "#e *o$( reservoir %( "#e #e%"

p'pe( "o "#e srro(i7s.

16. Give expressio !or "#e *oe!!i*ie" o! per!or'%*e o! % #e%" p'p.

/ = Q(W

18. Give expressio !or "#e e!!i*ie*) o! % C%ro" e7ie.

= ( ' "*"(

1


4/5

1?. Give expressio !or "#e #e%" %+sor+e(re$e%se( (ri7 p#%se

*#%7e.

Q = m 2

where 2 is the latent heat

m is the mass of the body

1@. Give expressio !or i*re%se i i"er%$ eer7) o! % 7%s.

2. #%" is "#e s$ope o! % iso"#er'%$ *rve/)dd!isothermal= ' )!

21. Give "#e expressio !or "#e &or, (oe i % %(i%+%"i* pro*ess o %

i(e%$ 7%s.

22. Give "#e re$%"ios#ip +e"&ee "#e s$ope o! %(i%+%"i* %( iso"#er'%$

*rves.

3lopeadiabatic= 4 3lopeisothermal

20. Give expressio !or &or, (oe i % C%ro" *)*$e.

W = n% )"(' "* ln )!*!(

26. Give expressio !or *#%7e i e"rop) (ri7 p#%se "r%si"io.

3 = m2"

where 2 is the latent heat

28. Give expressio !or "#e *#%7e i e"rop) o! % i(e%$ 7%s i "er's

5


5/5

o! Cv.

3 = n6&vln )"f"i + % ln )!f!i

2

chapter 12 - thermodynamics - formulae

Documents