4. A drum 6 inches in diameter and 40 inches long contained acetylene at 250 psia and 80 degrees Fahrenheit. After some of the acetylene was used the pressure at the drum was 100 psia and the temperature was 70 degrees Fahrenheit. The used acetylene was at 14.7 psia and 60 degrees Fahrenheit . The gas constant R for acetylene is 59.35 ft-lb/lb-R. Determine:

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Oxygen is heated from 700 to 1000 R. Determine the enthalpy energy change Ah of oxygen, in Btu/lbm, using the cp value at the average temperature from the table. (You must provide an answer before moving on to the next part.) The enthalpy energy change of oxygen is 218 Btu/lbm.

I am getting 160°C and 320°F. Please Clarify the answer Whether it's 22°C or 160°C.

On some temperature scale 0oC is equivalent to 80oV and 100oC is equivalent to 250oV. Determine the temperature in oC corresponding to 200oV.