Why is calcium white? What causes color at the level of an atom or a molecule?

Started by KüssendistSpaß101 | Last post by Borek July 13, 2013, 03:19:03 AM

Why is ΔU = 0 for isothermal?

Started by G O D I V A | Last post by researcher November 22, 2009, 09:56:05 AM

why ionic radius of K+ > Ca2+?

Started by e_w | Last post by leela sriram October 25, 2009, 03:57:24 PM

Why Internal energy is dependent on State ?

Started by 5416339 | Last post by Yggdrasil January 08, 2011, 01:29:51 AM

Why Gibbs free energy isn't always 0

Started by Agreetodisagree | Last post by joyalin February 06, 2022, 02:25:24 AM

Why ferromagnetic materials after removing magnetic field are demagnetization?

Started by crassman22 | Last post by Enthalpy July 13, 2018, 07:13:27 AM

Why dW=pdV？

Started by wolffporter | Last post by umangarora October 16, 2011, 12:48:46 PM

Why don't we consider VΔP when we define Q?

Started by zillai | Last post by zillai March 27, 2018, 07:28:01 AM

Why doesn't D block contraction affect other groups (14 15 etc.)

Started by GKRM2727 | Last post by GKRM2727 November 12, 2017, 09:38:28 PM

Why does the universe strive for disorder?

Started by K2Cr2O7 | Last post by Donaldson Tan October 17, 2006, 03:49:15 PM

WHY does the 2nd law of Thermodynamics work?

Started by pjoseph | Last post by McCoy April 30, 2010, 05:55:43 AM

Why does resonance lower the energy?

Started by poobear | Last post by poobear March 19, 2011, 01:43:26 PM

why does one have to use external p to calculate w

Started by georg gill | Last post by juanrga February 20, 2012, 12:49:11 PM

Why does Fe3+ have a lower pKa than Al3+?

Started by knightsljx | Last post by knightsljx August 18, 2014, 02:20:13 AM

Why does entropy of surroundings not depend on reversible q?

Started by RobNk | Last post by RobNk November 18, 2010, 11:22:45 AM