chapter 12 - thermodynamics - formulae
TRANSCRIPT
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8/10/2019 Chapter 12 - Thermodynamics - Formulae
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=. 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
*
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i "er's o! "#e #e%" ex"r%*"e( !ro' "#e *o$( reservoir %( "#e #e%"
p'pe( "o "#e srro(i7s.
16. Give expressio !or "#e *oe!!i*ie" o! per!or'%*e o! % #e%" p'p.
/ = Q(W
18. Give expressio !or "#e e!!i*ie*) o! % C%ro" e7ie.
= ( ' "*"(
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1?. Give expressio !or "#e #e%" %+sor+e(re$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
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o! Cv.
3 = n6&vln )"f"i + % ln )!f!i
2