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Tanya [424]
3 years ago
5

A closed system consists of 0.3 kmol of octane occupying a volume of 5 m³. Determine (a) the weight of the system, in N, and (b)

the molar- and mass-based specific volumes, in m³/kmol and m³/kg respectively. Let g=9.81m/s².
Engineering
1 answer:
Leni [432]3 years ago
7 0

Answer:

a) m=336.18N

b) Vn=16.67m/kmol

Vm=0.1459m^3/kg

Explanation:

To calculate the mass of the octane(m):

Number of mole of octane (n) =0.3kmol(given)

Molarmass of octane (M) =114.23kg/kmol

m=n*M

m=(0.3kmol)*(114.23kg/kmol)

m=34.269kg

To calculate for the weight of octane(W):

W=g*m

W=(9.81m/s^2)*(34.269kg)

W=336.18N

b) For specific volumes of Vn and Vm:

Given volume of octane (V) =5m^3

Vm=V/m

Vm=5m^3/34.269kg

Vm=0.1459m^3/kg

And Vn will be :

Vn=V/m=5m^3/0.3kmol

Vn=16.67m/Kmol

Therefore, the answers are:

a) m=336.18N

b) Vn=16.67m/kmol

Vm=0.1459m^3/kg

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Answer:

Heat required =7126.58 Btu.

Explanation:

Given that

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We know that

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Total heat=858.69 + 336 +6330.74 KJ

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We know that 1 KJ=0.947 Btu

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So heat required to covert ice into water is 7126.58 Btu.

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