Thermo Problem, involving ideal gasses and specific heat? - cp of ideal gas
Two kilograms of the gas with a molecular weight 28 are contained in a closed container, rigid electrical resistance. Resistance is based constant current of 10 amperes at a voltage of 12V for 10min. Measurements show that if an equilibrium is reached, the gas temperature rose to 40.3 º C. The transfer of heat to the environment is estimated that at a constant rate of 20W occur. Determine Assuming ideal gas behavior, the average value of the specific heat in kJ / kg * K gas in this temperature on measured data.
Thursday, January 7, 2010
Cp Of Ideal Gas Thermo Problem, Involving Ideal Gasses And Specific Heat?
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1 comments:
1) Calculate the energy, which was designed to gas heat --
= Power of electricity - the heat loss
= (Current * voltage - 20 W) * Times
= (10 * A 12 V - 20 W) * 600 = s 60kJ
2) Calculate the specific heat
= Specific heat, energy or increasing the temperature / mass
= 60 kJ / 40,3 m / 2 kg = 0744 kJ / (kg * K)
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