Chemistry

posted by .

At constant pressure, which of these systems do work on the surroundings? Check all that apply.

A(s) + 2B(g) ---> C(g)
2A(g) + B(g) ---> 4C(g)
A(g) + 2B(g) ---> 2C(g)
A(s) + B(s) ---> C(g)

  • Chemistry -

    If # mol gets larger, that's an expansion, and the system does work on the surroundings. If # mol gets smaller, that's a decrease in volume, and the surroundings do work on the system.
    Watch out for those solids. They are not gases and don't count when counting moles.

  • Chemistry -

    Thank you so very much~! <3

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Consider these changes. (a) Hg(l)->Hg(g) (b) 3O2(g)->2O3(g) (c) CuSo4*5H2O(s)->CuSO4(s)+5H2O(g) (d) H2(g)+F2(g)->2HF(g) At constant pressure, in which of the reactions is work done by the system on the surroundings?
  2. Chemistry

    At constant pressure, which of these systems do work on the surroundings?
  3. CHEM

    At constant pressure, which of these systems do work on the surroundings?
  4. chemistry

    A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 825kJ of heat from its surroundings and has 0.62J of work …
  5. physics

    An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done …
  6. physics

    An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done …
  7. physics

    An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done …
  8. Chemistry

    A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 824J of heat from its surroundings and has 0.62kJ of P−V …
  9. Chemistry

    A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 827 J of heat from its surroundings and has 0.66 kJ of P−V …
  10. Chemistry

    At constant pressure, which of these systems do work on the surroundings?

More Similar Questions