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A copper block of 0.4 kg mass and with heat capacity at constant pressure of 150J/K at 100°C is placed in a lake at 100°C.
Calculate the net entropy change of the gas (not the reservoirs) and obtain the relationship QAB/600K + QCD/300K = 8.64(J/K).
Prove that two isentropic curves do not intersect for systems of two independent variables.
Describe the behavior of the meniscus when the temperature of the system is raised under the conditions.
The specific entropy of saturated water at 1000e is 1.307kl/kg deg and that of saturated steam at the same temperature as 7.355 k.l/kg deg.
If P, v, and T are the pressure, molar volume, and temperature of a gas and Pc, vc, and Tc are the critical pressure, critical molar volume.
What is the specific enthalpy of superheated steam at the same pressure and a temperature of 300°C?
Show that the partial derivatives given in Eqs. (1) and (2) are independent of the equation of state for the hydrostatic system.
A convenient measure of the performance of a refrigerator is expressed by the coefficient of performance w, which is the ratio of the heat .
In an isothermal decrease of the magnetic field, heat is absorbed from one reservoir and converted completely into work. Is this a violation of the second law?
Prove that it is impossible for two reversible adiabatics to intersect.
Around the Carnot cycle, where point 1 at the beginning of the adiabatic compression has pressure P1 = Po .
Find the heat rejected, the work done by the engine, and the thermal efficiency.
Which is the more effective way to increase the thermal efficiency of a Carnot engine.
uppose that they absorb different amounts of heat from the high temperature reservoir, perform different amounts of work, but reject the same amounts of heat.
Each engine absorbs the heat rejected by the preceding one at the temperature at which it was rejected.
The initial state of 0.1 mol of an ideal monatomic gas is Po = 32Pa and Vo = 8m3 . The final state is P1 = 1 Pa and V1 = 64 m3.
Calculate the temperature ranges on the logarithmic scale and draw a conclusion about efficiency on the logarithmic scale.
Derive the expression for the efficiency of a Carnot engine directly from a TS diagram.
Sketch TS diagrams for the following four ideal gas cycles: Otto; Diesel; a rectangle on a PV diagram.
When the water has reached 373 K, what is the entropy change of the water, of the heat reservoir, and of the universe?
Mercury is poured into a U-tube open at both ends until the total length of mercury is h.
The valve is opened slightly, and the helium flows slowly and adiabatically into the container until the pressures on the two sides of the valve are equal.
If the ball is held initially at a position where the air pressure is exactly atmospheric and then allowed to fall, how far will the ball drop.
A ball of mass 16.65 g, placed in the tube of cross-sectional area 2.01 cm2, vibrates with a period of 0.834 s. What is , when the barometer reads 72.3 em?