Molecular Physics | Thermodynamics Answers

The pressure below the depth of 25 m of a homogenous fluid is 50.473 psi.

Calculate specific weight in kN/m3,density of fluid in kgm/m3 and its specific

gravity.

The depth of the fluid is 10 m. What is the specific gravity if the pressure of the fluid at 10 m is 100 kPa?

The outboard motor of a banca has an efficiency of 22% and it discards 1 x 10³] of heat every second. How much work does the motor do every second?

A turbine operates under steady flow conditions, receiving steam at the following state: Pressure

1.5 MPa, temperature 185 degree C, enthalpy 2785 kJ/kg, velocity 33.3 m/s and elevation 3 m.

The steam leaves the turbine at the following state: Pressure 22 kPa, enthalpy 2512 kJ/kg, velocity

100 m/s, and elevation 0 m. Heat is lost to the surroundings at the rate of 0.29 kJ/s. If the rate of

steam flow through the turbine is 0.42 kg/s, what is the power output of the turbine in kW?

The energy absorbed by an engine is two times greater than the work it performs.

What is its thermal efficiency?

What fraction of the energy absorbed is expelled to the cold reservoir?

In a water tank there is 12.0 liters of water at a temperature of 44.0 °C. Boiling water at 100.0 °C is poured into the tank until the water is at 90.0 °C. How many liters of boiling water was poured into the tank? The specific heat capacity of liquid water is 4.19 kJ/kg/°C.

Explain the difference between claperyon equation and Clausius claperyon equation

A gas turbine operates on a pressure ratio of 6. The inlet air temperature to the compressor

is 300 K and the temperature of air entering to the turbine is 580°C. If the volume rate of

air entering the compressor is 250 m3

/s. Calculate the net power output of the cycle. Also,

calculate the efficiency.

A heat pump working on the Carnot cycle takes in heat from a reservoir at 5°C and delivers

heat to a reservoir at 60°C. The heat pump is driven by a reversible heat engine which takes

in heat from a reservoir at 840°C and rejects heat to a reservoir at 60°C. The reversible heat

engine also forgives a machine that absorbs 30 kW. If the heat pump extract 17 kJ/s from

the 5°C reservoir, determine :

a) The rate of heat supply from the 840°C source

b) The rate of heat rejection to the 60°C sink.

A blower handles 1kg/s of air at 20^(@)C and consumes a power of 15kW.The inlet and outlet velocities of air are 100m/s and 150m/s respectively.Find the exit air temperature assuming adiabatic conditions.Take c_(p) of air is 1.005kJ/kg-K.