midterm 1-57 tu-free thermo

8/11/2019 Midterm 1-57 Tu-free Thermo

1/26

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3/26

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4/26

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5/26

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6/26

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7/26

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8/26

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AB.):;& C W A313> ;&0+ 3= >3@3>(> 30;* ;#* (9:&4 ?&A;= )< & ?&A;3;3*0$ T03;3&44( *% the tank contains 5 kg of water at 200 kPa and 25C, and the other

=3>( 3= (@&':&;(>$ 78( ?&A;3;3*0 3= ;8(0 A(,*@(>F &0> ;8( #&;(A (E?&0>= 30;* ;8( (0;3A( ;&0+$

78( #&;(A 3= &44*#(> ;* (E'8&01( 8(&; #3;8 3;= =:AA*:0>301= :0;34 ;8( ;(,?(A&;:A( 30 ;8( ;&0+

A(;:A0= ;* ;8( 303;3&4 @&4:( of 25C. Determine (a) the vol:,( *% ;8( ;&0+F C)D ;8( %30&4 ?A(==:A(F

&0> C'D ;8( 8(&; ;A&0=%(A %*A ;83= ?A*'(==$


9/26

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'(A 3= ;:A0(> *0 &0> ?&==(= & ':AA(0; *% Q$5 W %*A N ,30 %A*, & !5QYZ =*:A'($ W; ;8(

=&,( ;3,(F & 8(&; 4*== *% 6$J +[ *'':A=$ C&D 28*# ;8&; %*A & '4*=(> =&A< #*A+

U)&0> ;8( '8&01( 30 30;(A0&4 (0(A1< \ 30 ;8( %3A=;Y4 A(4&;3*0 '&0 )( '*,)30(> 30;* *0(

;(A,F ]F %*A & '*0=;&0; ?A(==:A( ?A*'(==$ C)D S(;(A,30( ;8( %30&4 ;(,?(A&;:A( *% ;8( =;(&,$


10/26

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@&?*A &; 5NQ +L&$ W; ;83= =;&;(F ;8( ?3=;*0 3= A(=;301 *0 & =(; *% =;*?=F &0> ;8( ,&==

*% ;8( ?3=;*0 3= =:'8 ;8&; & ?A(==:A( *% 6QQ +L& 3= A(9:3A(> ;* ,*@( 3;$ ](&; 3= 0*# =4*#4 ;* ;8( =;(&, :0;34 ;8( @*4:,( >*:)4(=$ 28*# ;8( ?A*'(== *0 & LY@ >3&1A&, #3;8

A(=?('; ;* =&;:A&;3*0 430(= &0> >(;(A,30( C&D ;8( %30&4 ;(,?(A&;:A(F C)D ;8( #*A+ >*0( >:A301 ;83=

?A*'(==F &0> C'D ;8( ;*;&4 8(&; ;A&0=%(A$


11/26

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12/26

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13/26

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#&;(A (0;(A= &0 3=*)&A3' )*34(A &; ;8( =&,( '*0>3;3*0= ;8&; 3; 4(&@(= ;8( ?:,?$ ](&; 3= =:??43(>

;* ;8( )*34(A &; ;8( A&;( *% !$NH E !QJ+[-8A$ ]*#(@(AF #&;(A 30 ;8( )*34(A A('(3@(= *04< XNO *%

;83= 8(&; #834( ;8( A(=; 3= 4*=; ;* ;8( (0@3A*0,(0;$ .< :=301 ;8( ;(,?(A&;:A(Y(0;A*?< >3&1A&,F ;* '&4':4&;( ;8( *:;4(; ;(,?(A&;:A( *% =;(&, %4*#301 *:; %A*, )*34(A$


14/26

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+1-=$ 78( =;(&, A(=:4;301 %A*, ;8( %4&=8301 ?A*'(== (0;(A= & ;:A)30( &0> 4(&@(= &; 5Q +L& #3;8

& ,*3=;:A( '*0;(0; *% N ?(A'(0;$ S(;(A,30( ;8( ;(,?(A&;:A( *% ;8( =;(&, &%;(A ;8( %4&=8301

?A*'(== &0> ;8( ?*#(A *:;?:; %A*, ;8( ;:A)30( 3% ;8( ?A(==:A( *% ;8( =;(&, &; ;8( (E3; *% ;8(

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15/26

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'*:?4(> &>3&)&;3' =;(&, ;:A)30( ;8&; 3= &4=* >A3@301 & 1(0(A&;*A$ 2;(&, (0;(A= ;8(

turbine at 12.5 MPa and 500C at& A&;( *% 5N +1-= &0> (E3;= &; !Q +L& &0> & 9:&43;< *%

Q$X5$ W3A (0;(A= ;8( '*,?A(==*A &; XV +L& &0> 5XN ^ &; & A&;( *% !Q +1-= &0> (E3;= &; ! KL&

&0> P5Q ^$ S(;(A,30( ;8( 0(; ?*#(A >(43@(A(> ;* ;8( 1(0(A&;*A )< ;8( ;:A)30($


16/26

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@(4*'3;< *% PQ ,-= &0> 4(&@(= &; 5N +L& #3;8 & 9:&43;< *% XN ?(A'(0;$ W 8(&; 4*== *%

6Q +[-+1 *'':A= >:A301 ;8( ?A*'(==$ 78( 304(; &A(& *% ;8( ;:A)30( 3= !NQ ',5F &0> ;8( (E3; &A(&

3= !HQQ ',5$ S(;(A,30( C&D ;8( ,&== %4*# A&;( *% ;8( =;(&,F C)D ;8( (E3; @(4*'3; C'D ;8(

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17/26

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W= & = ;8( (0;A*?< 30'A(&=(=$ 78:=F 3; 3= 0*; =:A?A3=301 ;8&; ;8( (0;A*?< *% =:)=;&0'( 3= 4*#(=; 30 ;8(

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18/26

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#83'8 !Q +1-= *% #&;(A &; 5N R &0> Q$! KL& &0> Q$N +1-= *% #&;(A &; !QQ RF Q$! KL&F

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;* ;83= >(@3'( &A( &; 5Q RF 3= ;83= ?A*'(== ?*==3)4(` T% 0*;F #8&; ;(,?(A&;:A( ,:=; ;8(=:AA*:0>301= 8&@( %*A ;8( ?A*'(== ;* )( ?*==3)4(`


19/26

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;:A)30( #*A+$


20/26

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AB.):;& 5= 78( A&>3&;*A *% & =;(&, 8(&;301 =

3= %344(> #3;8 =:?(A8(&;(> #&;(A @&?*A &; 5QQ +L& and 150C. At this moment both

;8( 304(; &0> ;8( (E3; @&4@(= ;* ;8( A&>3&;*A &A( '4*=(>$ W%;(A & #834( ;8( ;(,?(A&;:A( *% ;8(

steam drops to 40C as a result of8(&; ;A&0=%(A ;* ;8( A**, &3A$ S(;(A,30( ;8( (0;A*?< '8&01(

*% ;8( =;(&, >:A301 ;83= ?A*'(==$


21/26

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22/26

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3= (E?&0>(> ;8A*:18 &0 &>3&)&;3' ;:A)30($ 78( *:;4(; ?A(==:A( 3= Q$! KL&$ 78( (%%3'3(0'< *% ;8(

;:A)30( 3= JNO$ R&4':4&;( ;8( *:;4(; ;(,?(A&;:A( *% =;(&,$


23/26

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,&== %4*# A&;( *% 6 +1-= &0> 4(&@(= &; 6Q +L&$ 78( 3=(0;A*?3' (%%3'3(0'< *% ;8( ;:A)30( 3= Q$XQ$

b(14(';301 8( +30(;3' (0(A1< '8&01( *% ;8( =;(&,F >(;(A,30( C&D ;8( ;(,?(A&;:A( &; ;8( ;:A)30(

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24/26

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;:A)30( &; & A&;( *% !N +1-=$ 7(0 ?(A'(0; *% ;8( =;(&, 3= (E;A&';(> &; ;8( (0> *% ;8( %3A=; =;&1(

&; & ?A(==:A( *% !$5 KL& %*A *;8(A :=($ 78( A(,&30>(A *% ;8( =;(&, 3= %:A;8(A (E?&0>(> 30 ;8(

=('*0> =;&1( &0> 4(&@(= ;8( ;:A)30( &; 5Q +L&$ S(;(A,30( ;8( ?*#(A *:;?:; *% ;8( ;:A)30(F

&==:,301 C&D ;8( ?A*'(== 3= A(@(A=3)4( &0> C)D ;8( ;:A)30( 8&= &0 3=(0;A*?3' (%%3'3(0'< *% VV

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25/26

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26/26

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midterm 1-57 tu-free thermo

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