1. Explain whether the following situations and should be modeled as closed syst

Question

1. Explain whether the following situations and should be modeled as closed
systems, control volume systems, or transient systems. (2 pts each)
a. Hot Water Heater
b. Refrigerator
c. Washing Machine
d. Catalytic Converter in an automobile
e. Oven
f. Fire inside a room
g. Jet Aircraft Engine

2. Convert the following temperatures to ?F, ?C, K, R (4 pts)
a. 98.6 ?F b. 298 K c. 5715 ?F e. 100 ?C

3. Convert the following pressures to psia and kPa. (3 pts)
a. 760 mm of Hg b. 101 bar c. 15.3 x 106 N/m2

Explanation / Answer

a)

Hot Water Heater is Transient System becuase the properties varies with time

b)

Refrigerator is Closed system becuase nothing comes out or goes in

c)

Washing Machine is Closed System during Operation and Control Volume while filling or draining

d)

Catalytic Converter is Control volume becuase continuous flow of gases

e)

Oven is trasient system because Properties varies with time

f)

Fire inside a room is Transient System same reason

g)

Jet Aircraft Engine is Control Volume

2)

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