Estimate the average Cp value, in kJ/kg.K of a gas if 522 kJ of heat are necessary to raise the temperature from 300 K to 800 K
1 answer:
This question involves the concepts of the specific heat, mass, and, temperature.
The average Cp value is "".
<h3>SPECIFIC HEAT VALUE</h3>The specific heat of a gas at constant pressure is given by the following formula:
where,
- Cp = specific heat = ?
- ΔQ = heat required = 522 KJ
- ΔT = change in temperature = 800 K - 300 K = 500 K
- m = mass of gas = 1 kg (taking unit mass)
Therefore,
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Answer:
mechanical energy per unit mass is 887.4 J/kg
power generated is 443.7 MW
Explanation:
given data
average velocity = 3 m/s
rate = 500 m³/s
height h = 90 m
to find out
total mechanical energy and power generation potential
solution
we know that mechanical energy is sum of potential energy and kinetic energy
so
E = ×m×v² + m×g×h .............1
and energy per mass unit is
E/m = ×v² + g×h
put here value
E/m = ×3² + 9.81×90
E/m = 887.4 J/kg
so mechanical energy per unit mass is 887.4 J/kg
and
power generated is express as
power generated = energy per unit mass ×rate×density
power generated = 887.4× 500× 1000
power generated = 443700000
so power generated is 443.7 MW