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

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

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The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?