1. The problem statement, all variables and given/known data Can you please help me with this thermodynamic question?I am not a student. An aluminum cylinder with an interior area of 4.1875 sq ft (or 603 sq in) contains 7.445 lbs of CO2 gas under pressure.The volume of the cylinder is .582 cu ft.The temperature of this gas is 110 deg F.I want to know how much heat (in btus) will be transferred from the gas to the cylinder walls ,where the temperature is 80 deg F,in one second.I understand that the equation for heat transfer is q = KA (T1 – T2 ) / L. The K is the coefficient of conductivity.For CO2 it is .0081 btu / hr.and for aluminum it is 123 btu/ hr. How should I calculate the heat transfer? 2. Relevant equations q = KA (T1 - T2) 3. The attempt at a solution I think I should use the co efficient for CO2 so the equation should read q = .0081 btu /hr 4.1875 sq ft ( 110 - 80 ).I am not sure what I should use for L.Should it be half the radius of the cylinder?