UNIVERSITY OF TECHNOLOGY, JAMAICA
FACULTY:
SCIENCE AND SPORT
SCHOOL:
NATURAL AND APPLIED SCIENCES
Final Examination, Semester I
_____________________________________________________________________________
Module Name:
General Chemistry I
Module Code:
CHY2021
Date:
December
2009
Theory/Practical:
Theory
Groups:
AS-1/MT-1/DN-1/EH-1/SE-2/BENG-1/BUILT-1
Duration:
2 HOURS
______________________________________________________________________________
Instructions:
This paper consists of a cover page and 3 printed pages with six (6)
questions.
ANSWER ANY FOUR (4)
QUESTIONS
______________________________________________________________________________
Constants
:
1atm = 760 mmHg = 760 torr = 101.3 kPa
Avogadro’s number (
N
A
) = 6.022
10
23
Universal gas constant,
R
= 8.314 J mol
-1
K
-1
= 0.08206 L.atm K
-1
mol
-1
Planck’s constant (
h
) = 6.626
10
-34
Js
Speed of light (
c
) = 3.00
10
8
m s
-1
Rydberg constant,
R
H
= 2.18
10
-18
J
1 Faraday = 96,500 C/mol e
-
1 mol any gas at
stp
= 22.4 dm
3
, at room temperature = 24 dm
3
______________________________________________________________________________
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO
0
QUESTION 1a.Use the kinetic particle theory to account for the different states of matter. [4]b.Differentiate between the following:(i)chemical and physical properties(ii)homogeneous and heterogeneous mixtures[2 + 2]c.Discuss Rutherford’s Gold Foil Experiment and the conclusions made from this experiment in the early elucidation of the atomic structure.{NB: the use of suitable and clearly labelled diagrams are expected}[6]d.Calculate the principal quantum number energy level (nf) reached when an electron is excited from the n= 2 quantum level by absorbing 4.088 10-19Jin a hydrogen atom.[3]e.Draw representatives of the three, 2 porbitals. How do they differ?
[3]
[Total = 20 marks]
