Which option identifies the step skipped in the following scenario?
2 answers:
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Answer:
Work = 651,1011 kJ
Explanation:
Let´s take the car as a system in order to apply the first law of thermodynamics as follows:
Where
And considering that there is no mass transfer and that the only energy flows that interact with the system are the heat losses and the work needed to move the car we have:
Regarding the energy system we have the following:
By doing the calculations we have:
Consider that in the previous calculation, the kinetic and potential energy terms were divided by 1.000 to change the units from J to kJ.
Finally, the work needed to move the car under the required conditions is calculated as follows:
Consider that in the previous calculation, the heat loss was changed previously from BTU to kJ.
Answer:
Explanation:
The internal energy is equal to:
The entropy is equal to:
If we write the pressure derivative in terms of isothermal compresibility and volume expansivity, we have
Replacing:
Answer:
(d) 2996 kJ
Explanation:
We have given initial volume
initial pressure
initial temperature
we know that during isothermal process the work done is given by
where
putting all these value in formula of work done
=-2995.8 kJ here negative sign indicates that work is dine on the gas
so wok done =2995.8 kJ