At 25ºC, gas in a rigid cylinder with a movable piston has a volume of 145 mL and a pressure of 125 kPa. Then the gas is compressed to a volume of 80. ML. What is the new pressure of the gas if the temperature is held at 25ºC?

P2 = 226.6 kPa (Approx)

Explanation:

Given:

Temperature t =  25ºC

Old volume v1 = 145 ml

Old pressure p1 = 125 KPa

New volume v2 = 80 ml

Find:

New pressure p2

Computation:

p1v1 = p2v2

125 x 145 = P2 x 80

P2 = 226.6 kPa (Approx)

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-