Agas in a piston–cylinder assembly undergoes a process for which the relationship between pressure and volume is pvn = constant. the initial pressure is 1 bar, the initial volume is 0.12 m3, and the final pressure is 9 bar. the value of the polytropic exponent is n = 1.9. determine the final volume, in m3, and the work for the process, in kj.

The final volume is: 0.038 m3 adn the work for the process is: -24.42 KJ

Explanation:

The equation given for a polytropic process when n and C are constants. First we determine the C with the initial conditions:, we need to remember that 1 bar is the same to 100000 Pascals. Then we can calculate the final volume solving the equation given to: so we get:. Now using the integration for work:, replacing data we find the work process like:

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)