A compressed air tank contains 4.6 kg of air at a temperature of 77 °C. A gage on the tank reads 300 kPa. Determine the volume of the tank.

Respuesta :

Answer : The volume of the tank is, 1.54 mL

Explanation :

To calculate the volume of gas we are using ideal gas equation:

[tex]PV=nRT\\\\PV=\frac{w}{M}RT[/tex]

where,

P = pressure of gas = 300 kPa = 2.96 atm

Conversion used : (1 atm = 101.325 kPa)

V = volume of gas = ?

T = temperature of gas = [tex]77^oC=273+77=350K[/tex]

R = gas constant = 0.0821 L.atm/mole.K

w = mass of gas = 4.6 kg  = 4600 g

M = molar mass of air = 28.96 g/mole

Now put all the given values in the ideal gas equation, we get:

[tex](2.96atm)\times V=\frac{4600g}{28.96g/mole}\times (0.0821L.atm/mole.K)\times (350K)[/tex]

[tex]V=1541.98L=1.54mL[/tex]        (1 L = 1000 mL)

Therefore, the volume of the tank is, 1.54 mL

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