Applied Thermodynamics, 3rd Edition by Onkar Singh

By Onkar Singh

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87 kg/kmol Ans. 33 34 _________________________________________________________ Applied Thermodynamics 23. 5 MPa and 107ºC. For 5 kg mass of mixture carry out gravimetric analysis and determine the partial pressure of gases in mixture. Solution: ni Vi = n V where ‘ni’ and ‘Vi’ are no. of moles and volume fraction of constituent while ‘n’ and V are total no. of moles and total volume of mixture. 84 Gravimetric analysis refers to the mass fraction analysis. Mass fraction of constituents = Mole fraction of O2 = (Vi / V ) × Mol.

Estimate the % variation in temperature reading from a thermocouple having its test junction in gas and other reference junction at ice point. The temperature of gas using gas thermometer is found 50°C. Thermocouple is caliberated with emf varying linearly between ice point and steam point. f. 2 × 10–4 × t2, millivolts. f. f. f. f. f. 16°C % variation in temperature reading with respect to gas thermometer reading of 50°C. 32% Ans. = 5. In an unknown temperature scale freezing point of water is 0°X and boiling point of water is 1000°X.

Solution: Initial states : 100 × 103 Pa, 300 K, 5 m3 Final states : 50 × 103 Pa, 280 K, 5 m3 Let initial and final mass of air be m1 and m2. e 100 kPa and 300 K; V = ( m1 − m2 ) . 32 m3 Ans. = 16. A cylindrical vessel of 1 m diameter and 4 m length has hydrogen gas at pressure of 100 kPa and 27ºC. Determine the amount of heat to be supplied so as to increase gas pressure to 125 kPa. 183 kJ/kg K. 28 _________________________________________________________ Applied Thermodynamics Solution: Assuming hydrogen to be perfect gas let initial and final states be denoted by subscript 1 and 2.

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