Recent content by izen

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    Reaction between water and chromium metal

    Hi there, How to write the reaction between water and chromium metal under standard (i) acid and (ii) base condition? Cr + 3H2O ----> Cr(OH)3 + 3e- + 3 H+ (acid condition) basic solution ??? Please help
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    The different between the work (PV ) in ΔU and the work (PV ) ΔH

    Hi Chet thanks for the answer :)
  3. I

    The different between the work (PV ) in ΔU and the work (PV ) ΔH

    Hi Chet, I will be waiting for you here. Enjoy your evening. :) Izen
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    The different between the work (PV ) in ΔU and the work (PV ) ΔH

    w= -P ΔV in case of constant Pressure, ΔH= (q -PΔV) +PΔV >> ΔH= q So w in ΔU will be the same when constant pressure with Δ(PV) in ΔH ? if the pressure is not constant What is P in ΔU ? is it P external? and what is P in ΔH ? P in ΔH is Pressure of system? in case of ideal gas, Δ(PV) = nRT so...
  5. I

    The different between the work (PV ) in ΔU and the work (PV ) ΔH

    By definition ΔU = q+PV ΔH = ΔU+PV Well, what are the different between the work (PV ) in ΔU and the work (PV ) ΔH then ? thank you
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    Limit of sequence lim n (1-cos(2/n))

    1. Homework Statement 2. Homework Equations 3. The Attempt at a Solution above picture !! Exam in 3 hours :( please help
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    Laplace transform solve integral equation

    Thanks lurflurf I got it now :)
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    Laplace transform solve integral equation

    u meant put L{y} to the same side and then reverse transform? I'm try that way but still didnt get that answer
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    Laplace transform solve integral equation

    1. Homework Statement 2. Homework Equations 3. The Attempt at a Solution The answer is y(t) = t^{4}+\frac{t^{6}}{30} Don't know what to do next any advices please
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    Trigonometry identity sin(pi)cos(wpi)+cos(pi)sin(wpi)

    Ohhh :shy: Just been thinking about using trig identity, thank you Dick !
  11. I

    Trigonometry identity sin(pi)cos(wpi)+cos(pi)sin(wpi)

    1. Homework Statement Hi guys, How can sin(∏)cos(ω∏)-cos(∏)sin(ω∏) = sin(ω∏)? please guide me trigonometry identity to apply with this? 2. Homework Equations 3. The Attempt at a Solution
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