Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN: 9781259696527
Author: J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher: McGraw-Hill Education
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Transcribed Image Text:4. Which property of a system increases when heat is transferred: (a) at constant volume, (b) at
constant pressure?
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- in a closed system process, 600 Btu of heat is added to the system, and the internal energy of the system increases by 220 btu. calculate the work of the processarrow_forwardWhen two objects at different temperatures are brought into contact with one another (such as a hot steel bar dropped into cold water), the cold object will O increase in temperature to the same temperature as the hot object before being placed in the water. O lose as much heat as the hot object loses the cold object will remain unchanged O gain as much heat as the hot object losesarrow_forwardSteam enters a heat exchanger operating at steady state at 2 bar with a specific enthalpy of 1845 kJ/kg and exits at the same pressure as a saturated liquid. The steam mass flow rate is 1.6 kg/min. A separate stream of air with a mass flow rate of 68.5 kg/min enters at 37 °C and exits at 66.3 °C. The ideal gas model with c, = 1.005 kJ/kg.K can be assumed for air. Kinetic and potential energy effects are negligible.arrow_forward
- Determine the efficiency for the cycle (standard air used as the working fluid) indicated in the sketch. Assume the pressures and temperatures are known quantities at each state. 1-2 constant volume process and 2-3 constant pressure process.arrow_forwardThe work done when a gas is expanded in a cylinder is -220 J. A heat transfer of 190 J occurs from the surrounding to the gas. Calculate ∆E of the gas in J.arrow_forwardRoasted lead ore with composition: 25% PbO, 18% PbS, 22% Fe2O3, 2% Cu2S, 29% SiO2, 4% CaO is smelted using CaCO3 as a flux to obtain a slag containing 18% CaO. Coke containing 89% C and 11% SiO2 is used as a fuel by 15% of ore weight. 5% of Pb is lost in flue gases and its 8% is transformed to matte. Half of Cu is found in matte and the other half in lead ore. 10% of S is lost as flue gases. For 1000 kg of ore, Determine the weight of Pb Determine the weight of matte Determine the weight of CaCO3 addedarrow_forward
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