The equation for the heat transfer to or from a stream of gas flowing in turbulent motion is as follows: 

• where  = heat capacity as
• Btu is british Thermal Unit; lb = Pound; F = Fahrenheit change
• D = internal diameter of pipe as inches
• G = mass velocity as
• h = heat transfer coefficient as 

It is desired to transform the equation to a new form where

•  is in kcal per kg per degree celsius change
• D is in cm
• G in kg per m^2 per second
• heat transfer coefficient h in kcal per hour per m^2 per degree Celsius change

Problem taken from Chemical Process Principles by Hougen, Watson and Ragatz, 1976.

Solution to the problem here.