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 ยบ 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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