Question

Air (ideal and perfect gas) with mass of 8.000kg is heated at constant pressure of 9.000mbar (gage) from -20.810C to 179.148C. Determine the heat required in MJ, and the change of the system volume (ΔV= V2-V1).

Answer 1

Question #78370, Engineering / Chemical Engineering

Air (ideal and perfect gas) with mass of 8.000kg is heated at constant pressure of 9.000mbar (gage) from -20.810C to 179.148C. Determine the heat required in MJ, and the change of the system volume ($\Delta V = V2 - V1$)

Solution

$$Q = m c_p \Delta T = (8)(1006)(179.148 - 20.810) = 1.274\,V.$$ $$\Delta V = \frac{m R \Delta T}{p} = \frac{(8)(287.058)(179.148 - 20.810)}{900} = 404.0\,m^3.$$

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