Piston-cylinder device contains helium gas

Assignment Help Mechanical Engineering

Reference no: EM13707011

A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.4 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.

Reference no: EM13707011

Questions Cloud

Statement of the first law of thermodynamics : Select a correct statement of the first law of thermodynamics, and briefly explain why:

Heat is supplied to the airflow : As shown in the picture, air flows through a pipe. Heat is supplied to the airflow. The air at the inlet is 200kPa and 20 C with flow velocity of 5m/s. The exiting air is 180 kPa and 40 °C. The diameter of the pipe is 0.28 m. Determine (a) the volume..

Summer at a local produce stand exhibit a linear trend : Weekly sales for watermelons over the summer at a local produce stand exhibit a linear trend. The demand for weeks 1 through 10 was 91, 94, 95, 97, 92, 101, 107, 116, 113, and 121. Calculate the forecasts for weeks 2 through 10 using Holt’s double ex..

Coefficient of kinetic friction between the tires and road : A 2-Mg car has a velocity of v1 = 100 km/h when the driver sees an obstacle in front of the car. It takes 0.7s for him to react and lock the brakes, causing the car to skid. If the car stops when it has traveled a distance of 225m, determine the coef..

Piston-cylinder device contains helium gas : A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.4 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.

How much of the stem would protrude above the liquid surface : When a hydrometer having a stem diameter of 0.30 in. is placed in water, the stem protrudes 3.15 in. above the water surface. If the water is replaced with a liquid having a specific gravity of 1.19, how much of the stem would protrude above the liqu..

Mass flow rate of steam produced by the evaporator : Orange juice at 5% total solids (by mass, wet basis) is concentrated in a single-effect evaporator to produce a concentrated juice with 40% total solids (by mass, wet basis). If the unit is producing 100 kg/hr of concentrated juice, how much fresh or..

Write an algebraic expression for each verbal expression : 2. Write an algebraic expression for each verbal expression. (a) a number m minus five (b) the sum of two times a number k and seven (c) two third of a number x plus ten (d) the product of 7 and m to the fifth power.

Write two ways of each algebraic expression in words : 1. Write two ways of each algebraic expression in words. (a) m + 7 (b) z - 11 (c) 5 × a (d) b ÷ 9

User Account

All Pages