Recent content by elasticities

  1. E

    Graduate Reversible Processes: Isothermal to Adiabatic Transition

    But isn't evaporation of a puddle after rain a physical change that is not at equilibrium? Also is an open bottle of carbonated beverage (like a 2L bottle) an example of a chemical change not at equilibrium?
  2. E

    Equilibrium Question: CuSO4 * 5 H2O, Temp, & Concentration

    Here's another similar question. Homework Statement A supersaturated solution of sodium acetate was prepared by adding sodium acetate to a saturated solution and heated to dissolve added crystals. Finally the solution was left to return slowly to room temperature. A single crystal of sodium...
  3. E

    Equilibrium Question: CuSO4 * 5 H2O, Temp, & Concentration

    Homework Statement Crystals of CuSO4 * 5 H2O are blue. If you place a few small crystals in a beaker of water, water molecules break apart the ions and they enter into the solution. A few ions in the solution may re-attach to the crystals. Because more ions enter the solution than reattach to...
  4. E

    Graduate Reversible Processes: Isothermal to Adiabatic Transition

    Really? Like a chemical process not at equilibrium would be a open can of pop...
  5. E

    Graduate Reversible Processes: Isothermal to Adiabatic Transition

    Whats an example of a reversible physical change not at equilibrium?
  6. E

    Enthelpy of a Neutralization Reaction

    The salt dissolves...? I'm sorry...I still don't get it. :S Thanks for explaining my other question, by the way. :) Much appreciated.
  7. E

    Enthelpy of a Neutralization Reaction

    Another question on the tangent of thermochemistry - Why are fractions allowed in thermochemical equations but not otherwise?
  8. E

    Enthelpy of a Neutralization Reaction

    The reaction is a neutralization reaction resulting in NaCl and H2O...right?
  9. E

    Enthelpy of a Neutralization Reaction

    Homework Statement Say there was an experiment between NaOH and HCl. The reaction is a neutralization reaction resulting in NaCl and H2O. The question is: What if the two reactants weren't aqueous, but if NaOH was in solid pellets instead? Homework Equations Neutralization reactions are...
  10. E

    Are all neutralization reactions exothermic?

    Why is it better to use water?
  11. E

    Are all neutralization reactions exothermic?

    Homework Statement When acid gets on your skin, why must you flush the area with plenty of water rather than neutralizing with a base? Homework Equations The Attempt at a Solution I'm guessing it's because neutralization reactions are exothermic so heat could be released, thus...
  12. E

    Easy-ish Conservation of Energy question

    Silly textbook, thanks though! :)
  13. E

    Where Is the Point of Zero Net Gravitational Force Between Earth and the Moon

    Ok thanks, I think the textbook answer was just wrong. :)
  14. E

    Easy-ish Conservation of Energy question

    Maybe the answer is wrong in the textbook, it says 5m/s. It's Nelson Physics 12 from 2003 I think.
  15. E

    Easy-ish Conservation of Energy question

    1/2m(v1)^2+mgh1=1/2m(v2)^2+mgh2 1/2(v1)^2+gh1=1/2(v2)^2+gh2 1/2(v1)^2+(9.81)(440m)=1/2(93)^2+(9.81)(387.2m) 1/2(v1)^2+(4316.4)=4324.5+3798.432 1/2(v1)^2=3824.532 v1=87.5m/s But this is not the answer in the answers section of the textbook.