Chemistry

posted by .

Classify the possible combinations of signs for a reaction's ∆H and ∆S values by the resulting spontaneity.

A) Spontaneous as written at all temperatures.
B) Spontaneous in reverse at all temperatures.
C) Spontaneous as written above a certain temperature.
D) Spontaneous as written, below a certain temperature.

1) ∆H = + // ∆S = +
2) ∆H = - // ∆S = +
3) ∆H = - // ∆S = -
4) ∆H = + // ∆S = -



I'm beyond confused. Please help!

  • Chemistry -

    See this link. It answers each.
    http://en.wikipedia.org/wiki/Spontaneous_process

  • Chemistry -

    1)c
    2)d
    3)b
    4)a

  • Chemistry -

    1 c
    2 a
    3 d
    4 b

  • Chemistry -

    Paige is correct

  • Chemistry -

    Thanks page

  • Chemistry -

    Thanks Paige.

  • Chemistry -

    Thanks Paige! :D

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Do any of you think that spontaneous combustion is possible?
  2. Chemistry

    Assuming the dissolution of borax in water is a spontaneous reaction, do you expect the change in enthalpy to be positive or negative or are both signs possible?
  3. chemistry

    Is the dissolution of borax in water a temperature dependent reaction or is it spontaneous at all temperatures at which water is liquid?
  4. Chemistry

    Delta H is 20.1 kJ/mol and Delta S is 45.9 J/(mol-k). Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
  5. Chemistry

    Consider the following reaction at constant P. Use the information here to determine the value of ΔSsurr at 398 K. Predict whether or not this reaction will be spontaneous at this temperature. 4 NH3(g) + 3 O2(g) → 2 N2(g) …
  6. Chemistry

    Please help me with these problems, the book examples very different. I'm really confused. Any help with these will help me immensely. Thank you in advance! What I got were: 1.)c 2.)d 3.)a 4.)c 5.)b 1.) When is any endothermic reaction …
  7. chemistry

    The G value for formation of gaseous water at 298 K and 1 atm is -278 kJ/mol. What is the nature of the spontaneity of formation of gaseous water at these conditions?
  8. Chemistry

    Identify the correct statement for the following reaction: Br2 (l) → Br2 (g) ΔH° = 30.9 kJ ΔS° = 93.2 J/K A) The reaction is always spontaneous. B) The reaction is never spontaneous. C) The reaction is at equilibrium; …
  9. AP Chemistry

    Hey guys! I have answers, but am confused. Please and thanks for any help! A) Which of the following is false?
  10. chemistry help!!! please!!! DrBob222 I need you!!

    The G value for formation of gaseous water at 298 K and 1 atm is -278 kJ/mol. What is the nature of the spontaneity of formation of gaseous water at these conditions?

More Similar Questions