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Consider a mixture of air and gasoline vapor in

a cylinder. The original volume is 40. cm3. If the

combustion releases 950 J of energy, to what volume

in L will the gases expand against a constant

pressure of 650 torr if all the energy of combustion is

converted into work to push back the piston?

I know how to do the problem... you just do 950 = P*deltaV, butwhat units would I use for pressure and for volume to yieldjoules?

Respuesta :

Akinny

Answer:

11 L

Explanation:

Work-done = P (V₂ - V₁)--------------------------------------- (1)

P= 650 torr

 =  86659.5 N/m²

V₁=40 cm³

   = 40 x 10⁻⁶  m³

V₂ = ?

Workdone =950 J

Substituting into equation (1)

950 =  86659.5 ( V₂- 40 x 10⁻⁶ )

V₂= (950/86659.5) + 40 x 10⁻⁶

    = 0.01096 + 40 x 10⁻⁶

    = 0.011 ‬m³

    = 11 L

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