Blog

Determine the standard entropy change (∆So) for this reaction. 2HgO(s) ⟶2Hg(l) + O2(g) Substance (state) So (J/mol.K) HgO(s) 70.3 Hg(l) 75.9 O2(g) 205.2  

Use the following values to calculate ∆S for the sublimation of 1 mole of I2. I2(s) ⟶I2(g) Substance (state) So (J/mol.K) I2(s) 116.1 I2(g) 260.7

A certain reaction has an activation energy of 25.0 kJ/mol. At what temperature will the reaction proceed four times faster than it did at 375 K?

The pH of a 0.150 M solution of weak acid HA is 4.35. Calculate the value of Ka for HA.

Calculate the mass of copper metal that will be deposited by passing a 25.0 A current through a solution of copper(II) sulfate for 3.00 h. Cu2+(aq) + 2 e⁻  →  Cu(s)   You must show all of your work including units for credit.

Calculate ΔSsurr at 298 K. 2NO2(g) → N2(g) + 2O2(g) ΔH = -66.4 kJ

A certain reaction has an activation energy of 25.0 kJ/mol. At what temperature will the reaction proceed three times faster than it did at 298 K?

Which of the following set of acids and conjugate bases would buffer most effectively at pH = 7.00?

Which of the following is true when ∆G = 0?

Calculate the pH of a buffer containing 1.25 M formic acid, HCOOH (Ka = 1.8 × 10-4) and 2.50 M sodium formate, HCOONa.You must show all of your work for credit.