Molecular Physics | Thermodynamics Answers

A steam turbine receives a steam flow of 1.35 kg/s and delivers 500 kW. The heat loss fromthe casing is negligible. a) Find the change in specific enthalpy across the turbine when the velocities at entrance andexit and the differences in elevation at entrance and exit are negligible.b) Find the change in specific enthalpy across the turbine when the velocity at entrance is 60m/s, the velocity at exit is 360 m/s and the inlet pipe is 3 m above the exhaust pipe

A fluid at 0.7 bar occupying 0.09m3 is compressed reversibly to a pressure of 3.5 bar according to law pvn = constant. The fluid is then heated reversibly at constant volume until the pressure is 4 bar; the spesific volume is then 0.05m3 / kg. A reversible expansion according to a law pv2 = constant restores the fluid to its initial state. Sketch the cycle to a p-v diagram and calculate: i) The mass of fluid present (THIS is the one I cannot seem to figure out.. basics be damned) ii) the value of n in the first process. iii) the net work of the cycle.

The latent heat of fusion for water is 33.5 × 104 J/kg, while the latent heat of vaporization is 22.6 × 105 J/kg. What mass m of water at 0 °C must be frozen in order to release the amount of heat that 2.99 kg of steam at 100 °C releases when it condenses?

A 10-meter object is placed at a distance
of 175 meters in front of a lens whose
focal length is 50 meters. Which of the
following describes the image formed?

How does the four (4) Laws of Thermodynamics apply its rules to a refrigerator when a hot soup is placed inside it?

An ideal heat engine operating at 15 % efficiency exhausts heat into a cold reservoir at 280 K. By how much would the temperature of the hot reservoir need to be raised (in K) in order to increase the efficiency of the heat engine to 35.6 %?

A 25.0L tank contains 2.0kg of neon gas with a pressure of 98.0 atm at 28 degrees celcius. How many kilograms of oxygen can fill the tank under the same pressure and temperature?

Suppose 2.84 moles of a monatomic ideal gas expand adiabatically, and its temperature decreases from 384 to 266 K. Determine (a) the work done (including the algebraic sign) by the gas, and (b) the change in its internal energy.

When a monataomic ideal gas expands at a constant pressure of 5.4 x 105 Pa, the volume of the gas increases by 4.6 x 10-3 m3. Determine the heat that flows. If heat flows into the gas, then the heat flow is positive. If the heat flows out of the gas, then the heat flow is negative.

Why do every atom in the universe vibrating? What causes this vibration?