# Kinetic Theory (5, 8); Heat Transfer (6) - HP 48gII Advanced User's Reference Manual

Graphing calculator.

## Kinetic Theory (5, 8)

These equations describe properties of an ideal gas.
Equations:
n MW vrms
-------------------------------------- -
P
=
3 V
---------------------------------------------------
=
2
Example:
Given: P=100_kPa, V=2_1, T=26.85_ C, MW=18_g/gmol, d=2.5_nm.
Solution: vrms=644.7678_m/s, m=1.4433E–3_kg, n=0.0802_gmol, =1.4916_nm.

### Heat Transfer (6)

Variable
1, 2
max
∆T
A
c
e b 1 2
e b
f
h, h1,h3
k, k1, k2, k3
L, L1, L2, L3
m
Q
q
T
Tc
Th
Ti, Tf
U
References: 7, 9.
5-28 Equation Reference
2
3 R T
vrms
=
------------------ -
1
m
=
n MW
n NA
⎞ d
2
--------------- -
V
Description
Expansion coefficient
Elongation
Lower and upper wavelength limits
Wavelength of maximum emissive power
Temperature difference
Area
Specific heat
Emissive power in the range 1 to 2
Total emissive power
Fraction of emissive power in the range 1 to 2
Convective heat-transfer coefficient
Thermal conductivity
Length
Mass
Heat capacity
Heat transfer rate
Temperature
Cold surface temperature (Conduction), or
Cold fluid temperature
Hot surface temperature, or
Hot fluid temperature (Conduction + Convection)
Initial and final temperature
Overall heat transfer coefficient
MW