Chemistry 11 Santa Monica College Name: Date: A\'s-ed Lab Section: 4//4 4-tot La

Question

Chemistry 11 Santa Monica College Name: Date: A's-ed Lab Section: 4//4 4-tot Lab Report: Calorimetry and Hess's Law Lab Partner: . Metal + HCI Reaction Experimental Data ed Metal:A Trial 1 5.319 ( Trial 2 Hz($) Mass of dry, empty calorimeter Mass of calorimeter plus HC Mass of HCI used Mass of dry, empty beaker Mass of beaker plus metal Mass of metal used Initial (equilibrium) temperature of HO Final (maximum) temperature of mixture 3390 0.197 Data Analysis 1) Write the balanced equation for the reaction between your assigned metal and HCl. All balancing coefficients should be whole numbers. aHcl 2) Complete the table below with the results of your calculations Trial 1 Trial 2 Total mass of mixture, m Temperature change of mixture, AT SHC of mixture, c (use SHC of water) Heat absorbed by mixture, in J Heat released by reaction, in J Hn in Jig of metal used Han in k.J/mol of metal used AHn in kJ for the rxn as balanced Average AHam in kJ in (1)

Explanation / Answer

1) Energy of hydrogen = -13.6 eV z^2/n^2, where n is the orbital number and z is the atomic number

Energy (when n=1) = -13.6 eV * 1^2/1^2 = -13.6 eV

2) Energy of hydrogen = -13.6 eV z^2/n^2, where n is the orbital number and z is the atomic number

Energy (when n=2) = -13.6 eV * 1^2/2^2 = -3.4 eV

3) Energy Change (from n=2 to n=1) = -3.4 + 13.6 ev = 10.2 eV

4)

Wavelength = 912 * (1/1 - 1/4)^(-1) = 912 * 4/3 = 1216 Angstrom = 1.216 * 10^(-7)m

5)

Because the wavelength doesn't fall in the visible region

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.