Physics

Physics, 06.07.2019 16:30, bm42400

What effects can occur when heat energy is added to a system? select all that apply. increase in temperature decrease in temperature change of state phase change

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Physics, 17.08.2019 16:10, niescarlosj

Which of the choices is not a statement or direct application of the second law of thermodynamics? in operation, all heat engines result in an increase in internal energy. the change in internal energy of a system can be found by combining the heat energy added to a system minus the work done by the system. all natural processes tend toward states of greater disorder. heat energy naturally transfers from a high temperature substance to a low temperature substance.

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Engineering, 20.08.2019 20:20, amandaestevez030

Acounter current heat exchanger is used to heat a stream of xylene using a mixture of hot glycol. an engineer wants to improve the efficiency of this process. she intends to replace the heat exchanger with a similar model, except that the new model has a larger internal surface area. what will happen as a result of this change? a.) the temperature at b will decrease, and temperature d will increase b.) the tempature at b will be the same, and d will increase c.) the temperature at b will increase, and d will decrease. d.) the temperature at b will increase, and d will increase

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Physics, 14.09.2019 11:30, autumnguidry6867

One kg of air is contained in a closed tank at 300k, with rigid walls. heat is now added to increase the air temperature by 1°c. find the amount of heat added to the system, and the change in internal energy and enthalpy of the system. ii) one kg of air is contained in a closed tank at 300k, with a massless piston at one end. the pressure outside is 1 atm. heat is now added to increase the air temperature by 1°c. find the amount of heat added to the system, and the change in internal energy and enthalpy of the system. iii) solve above (i) and (ii) if the temperature increase is 2°c, rather than 1°c. given: assume constant cp=1.005 kj/kg k, and cv=0.718 kj/kg k.

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