第一章热力学基本概念
英文习题
1Expressi
gtemperaturerisei
differe
tu
its
Duri
gaheati
gprocessthetemperatureofasystemrisesby10℃Expressthisrisei
temperaturei
Ka
dR
2Absolutepressureofavacuumchamber
Avacuumgageco
ectedtoachamberreads58psiatwheretheatmospherepressureis145psiDetermi
ethepressurei
thechamber
locatio
absolute
3Measuri
gpressurewithama
ometer
Ama
ometerisusedtomeasurethepressurei
ata
kThehasaspecificgravityof085a
dthema
ometercolum
cmasshow
i
Fig11Ifthelocalatmosphericpressureisdetermi
etheabsolutepressurewithi
theta
k
4Measuri
gpressurewithamultifluidma
ometer
Thewateri
ata
kispressurizedbyaira
dthepressuremeasuredbyamultifluidma
ometerasshow
i
Fig12islocatedo
amou
tai
ata
altitudeof1400mwhereatmosphericpressureis856kPaDetermi
etheairi
theta
kifh101mh202ma
dh3035mTaketheofwateroila
dmercurytobe1000kgm3850kgm3600kgm3respectively
FIGURE11
fluidusedheightis5596kPa
isTheta
kthepressurede
sitiesa
d13
5Effectofpisto
weighto
pressurei

acyli
der
FIGURE12
Thepisto
ofaverticalpisto
cyli
derdeviceco
tai
i
ga
gashas
amassof60kga
dacrosssectio
alareaof004m2as
show
i

Fig13Thelocalatmospherepressureis097bara
d
the
gravitatio
alacceleratio
is981ms2aDetermi
ethe
pressure
i
sidethecyli
derbIfsomeheatistra
sferredtothe
gasa
d
itsvolumeisdoubleddoyouexpectthepressurei
side
the
cyli
dertocha
ge
6Bur
i
gofflu
chcalories
FIGURE13
A90kgma
hadtwohamburgersaregularservi
gofFre
chfriesa
da200mlCokeforlu
ch
Determi
ehowlo
gitwilltakeforhimtobur
thelu
chcaloriesoffabywatchi
gTVa
dbbyfast
swimmi
gWhatwouldyoura
swersbefora45kgma

7Bur
i
gofaca
dlei
a
i
sulatedroom
Aca
dleisbur
i
gi
awelli
sulatedroomTaki
gtheroomtheca
dleasthesystemdetermi
eaifthereisa
yheattra
sfer
airplustheduri
gthis
FIGURE14
fbur
i
gprocessa
dbifthereisa
ycha
gei
thei
ter
ale
ergyofthesystem
8Bou
daryworkduri
gaco
sta
tvolumeprocess
Arigidta
kco
tai
sairat500kPaa
d150℃Asaresultofheattra
sfertothesurrou
di
gsthetemperaturea
dpressurei
sidetheta
kdropto65℃a
d400kParespectivelyDetermi
ethebou
daryworkdo
eduri
gtheprocess
FIGURE15
FIGURE16
9Isothermalcompressio
ofa
idealgas
Apisto
cyli
derdevicei
itiallyco
tai
s04m3ofairat100kPaa
d80℃Theairis
owcompressedto01m3i
suchawaythatthetemperaturei
sidethecyli
derremai
sco
sta
tDetermi
etheworkdo
eduri
gthisprocess
10Heattra
sferfromaperso
Co
sideraperso
sta
di
gi
abreezyroomat20℃thetotalrateofheattra
sferfromthisr