Molecular Physics | Thermodynamics Answers

A Carnot engine operating between 527C and 27 C produces 600KW of work. Determine,

(a) Qa, KW; (b) Qr, KW; (c) ΔS during heat rejection, KW/K and (d) thermal efficiency of the cycle.

Two mole of an ideal gas is heated at a constant pressure of 101.3K Nm^-2 from 273.2 K to 373K. Calculate, in Joules, the work involved

The temperature of an ideal gas remains constant while the absolute pressure changes from 103.4 kPaa to 827.2 kPaa. (a) If the initial volume is 80 liter, what is the final volume? (b) for 160 gram of the gas, determine the change of density.

4kg of water at 50°C is poured on a large block of ice at 0°C. How much I've melts. Specific heat capacity of water= 4200J/Kg/°C. Latent heat of fusion of ice= 3.33x10^5J

    A gas in a cylinder expands from a volume of 0.120 m³ to 0.320 m³. Heat flows into the gas just rapidly enough to keep the pressure constant at 1.60 x 10⁵ Pa during the expansion. The total heat added is 1.15 x 10⁵ J. (a) Find the work done by the gas. (b) Find the change in internal energy of the gas. 

 A gas undergoes two processes. In the first, the volume remains constant at 0.250 m³ and the pressure increases from 2.00 x 10⁵ Pa to 6.00 x 10⁵ Pa. The second process is a compression to a volume of 0.120 m³ at a constant pressure of 5.00 x 10⁵ Pa. (a) In a pV-diagram, show both processes. (b) Find the total work done by the gas during both processes.

   Two moles of an ideal gas are heated at constant pressure from T = 27°C to T = 117°C. (a) Draw a pV-diagram for this process. (b) Calculate the work done by the gas.

An ideal gas is enclosed inside a chamber with a volume of 0.1 ft3 at 115 deg. Celsius

and 690 kPa. It then expands isentropically to a final pressure of 138 kPa. Calculate

the mass, final temperature, final volume, change in enthalpy and non-flow work done

during the process for this gas. Assume Cv = 0.7201 kJ/kg.K and Cp = 1.0048 kJ/kg.K

The work required to compress reversibly according to pV1.3= c is 45000 ft.lb if there

is no flow. Determine the change in internal energy and heat transferred if the gas is

air.

1) Classify three kinds of statistics, their need, applicability, the idea of phase space, macro-microstates.