This test should be performed on all cord sets, receptacles that aren't part of a building or structure's permanent wiring, and
1 answer:
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Answer: = 1.47kJ/K
Explanation: <u>Entropy</u> is the measure of a system's molecular disorder, i.e, the unuseful work a system does.
The nitrogen gas in the insulated tank can be described as an ideal gas, so it can be used the related formulas.
For the entropy, the ratio of initial and final temperatures is needed and as volume is constant, we use:
<u>Specific</u> <u>Heat</u> is the quantity of heat required to increase the temperature 1 degree of a unit mass of a substance. Specific heat of nitrogen at constant volume is 0.743kJ/kg.K
The change in entropy is calculated by
For the nitrogen insulated in a rigid tank:
Substituing:
1.47
The entropy change of nitrogen in an insulated rigid tank is 1.47kJ/K
Answer
given,
P₁ = 10 MPa T₁ = 800
P₂ = 800 KPa T₂ = ?
Using formula
For steam n = 1.33
T₂ = 573.368 K
T₂ = 573.368 - 273 = 300.368 °C
=
=
W = 434.53 kJ/kg