Physical Chemistry Answers

a pot of cold water is heated on a stove, and when the water boils, a fresh egg is placed in the water to cook. describe the events that are occuring in terms of the zeroth law of thermodynamics.

during a particular chemical reaction it takes 100Kj of energy to break all the bonds and 150 Kj of energy is released when the new bonds form. Which is true about the overall reaction?

1. it is endothermic and absorbs energy

2. it is exothermic and releases 50 Kj

3. It is exothermic and releases 150 Kj

4. it is endothermic and releases energy

(b) The cell reaction for a galvanic cell is given below Cu(s)+2Ag^(+)(aq)rarr Cu^(2+)(aq)+2Ag(s) (i) Write the half-cell reactions at the anode and the cathode (ii) Calculate the value of cell emf under standard conditions; use data from Table 7.1 (iii) Will the reaction be spontaneous as written?

What is amount of energy released in the formation of one mole of SrO bonds . The radius of stronium ion is 113pm and the radius of the oxide ion is 140pm?

Equilibrium constant for the reaction H2 + I2 2HI are 50.62 and 41.00 at 443 and 500 oC respectively Calculate change in free energy and eat of solution.

The norma boiling point of water is 100oC under what pressure will water boil at 102 oC ? The heat of vaporization of water is 2259jg-1

The reaction of ammonia gas to nitrogen monoxide gas yields nitrogen gas and water vapor. How many moles of each reactant will be present if 13.8 moles of nitrogen gas is produced?

100 ml of raw water sample on titration ith N/50 H2SO4 required 12.4 ml of acid to phenolphthalein end point and 15.2 ml of the acid to methyl orange end point. Determine the types and extent of alkalinity.

In the reaction Mg(OH)2 + 2HCl → MgCl2 + 2H2 O, you were given 15 grams of Mg(OH)2 and 25 grams of HCl. Which of the two reactants is the limiting reagent? How much MgCl2 will be produced in the reaction? (Mg(OH)2 = 58.32 g/mol, HCl = 36.46 g/mol, MgCl2 = 95.32 g/mol)

50 ml of an alkaline water sample requires 3.7 ml of 0.02 N HCL upto phenolphthalein end point and 4.8 ml of complete Neutralization. Find the type and amount of alkalinity in water sample.