ME 302 THERMODYNAMICS

ME 302

Thorncroft



HW #1


SHOW ALL WORK.

FOR THIS ASSIGNMENT ONLY
, YOU MAY PUT MORE THAN ONE PROBLEM ON A PAGE.


1
-
1



a.

How much does 3 kg weigh on the Earth, in N?

b.

How much does a person with a mass of 183 lb
m

weigh on the moon (lb
f
)? (The moon’s
gra
vity is one
-
sixth the Earth’s)

c.

A gallon of water weighs about 8 lb
f

on Earth. What is its mass in slugs?


1
-
2 Convert the following:


a.

-
1

C to degrees Fahrenheit

b.

103

F to degrees Rankine

c.

237

K to degrees Celsius

d.

A temperature
difference

of 10 degrees
Celsius to degrees Kelvin.

e.

A temperature
difference

of 10 degrees Rankine to degrees Fahrenheit.

f.

A temperature difference of 10 °C to °F.



1
-
3 The following table lists temperatures and specific volumes of water at two pressures:


p = 0.1 MPa

p = 0
.12 Mpa

T (

䌩

v ⡭
3
/kg)

T (

䌩

v ⡭
3
/kg)

200

2.172

200

1.808

240

2.359

240

1.965


Use linear interpolation to estimate:

a.

v at p = 0.1 MPa, T=213

C.

b.

p at T = 240

C, v = 2.000 m
3
/kg.


1
-
4

How many moles of oxygen (O
2
) are contained in .03 kg?


1
-
5

Using the I
deal Gas law, determine the volume, in m
3
, occupied by 1 mol of nitrogen (N
2
) at p = 17
MPa, T = 180 K.


1
-
6

Integrate the following:


a.

, where
p=1/V.





c.
, where
p

= constant.


b.

, where
=constant.