One mole of an ideal gas in a closed piston/cylinder is reversibly compressed from 0.2
mpa to 1 mpa. the heat capacity at constant pressure cp is 5r/2, and the gas is initially at
350 k.
a. sketch a diagram for the system and find the energy balance equation. use the
complete energy balance equation and simplify it by making valid assumptions.
b. if the ideal gas is compressed at a constant volume, what are δu, δh, q, and wec for
this pathway?
c. if the ideal gas is compressed isothermally, what are δu, δh, q, and wec for this
pathway

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

What are the similarities of physical and chemical change ?

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?