Physical Chemistry Answers

How much heat is absorbed when 234.567g of water is boiled

0.1978 g of copper is deposited by current of 0.2 ampere in 50 minutes.what is electrochemical equivalent of copper?

A covalent molecule M contains four shared pairs of electrons.What is M

how many molecules is 415 L sulfur dioxide a STP

For a liquid obeying the equation ofstate Vm
= c1 + c2T+c3T2 -c4P− c5PT,findexpressionsfor each
of the following propertiesin terms ofthe c’s,CP,P, T, andV: (a)CP
-CV
;(b)(

0.2 kg of water at 59oC is added to 0.4 kg of water at 20oC in a polystyrene cup. What is
the final temperature of the mixture?
(s.h.c. of water is 4200 J/kg/oC )

An isolated system contains 900 g of ice at 0 C. A hot iron block (2.5 kg and CP = 500 Cal C-1)
at 200 C was immersed in the isolated system containing ice. A following reaction gives the
enthalpy change of 1440 Cal mol-1. [Cp,m for H2O (l) = 18.0 Cal C-1 mol-1]
H2O(s) H2O(l)
Find;
(a) Final temperature of isolated system
(b) The entropy change of iron and water
(c) Total entropy and briefly explain.

How to balance the following equation? Including steps

aC2H4 + bH2O +cH+ + 2MnO4- ---> dC2H6O2. + eMn2+

Ammonia,carbon dioxide and water react together to form ammonium carbonate.
Which statement about this reaction is correct?
A.It is a redox reaction
B.It is an acid-base reaction

Explain

Consider the carbonate ion, CO32-
i) Setup and solve the Huckel secular equations for the pi-electrons.
ii) Express the energies in terms of the Coulomb integrals]
iii) Determine the delocalization energy.