Question

Assessing Some Possible Determinate Errors 1. One source of determinate error in this experiment would be in determining the temperature of the gas in the buret. Based on the temperature of the reaction mixture in the flask before and after reaction, is the reaction exothermic or endothermie? Describe how this temperature change would affect the volume of the gas collected in the buret, and the calculated value of the gas constant. (1 mark)

Answer 1

1) In question number one the temperature of the reaction isn't given. So it is hard to conclud anything

2) In question number to we have to tell how the value of gas constant is affected by some given conditions;

According to the ideal gas equation, we all know

PV=n RT

R= PV nT

this equations shows the relation between gas constant and other properties

a) Any leak will decrease the volume of the mixture, and therefore the value of gas constant will decrease. Because the value of gas constant is directly proportional to the volume of mixture.

b) A leak occured in the apparatus will lead in the decrease of volume, and R directly depends upon volume. If the volume will decrease, value of gas constant will also decrease.

c) Neglecting the pressure, will effect the value of gas constant directly, because value of gas constant depends directly upon the pressure.

d) If the reaction isn't completed there will less number of moles. And the relation between moles and value of gas constant is inverse. If the value of mole is less, the value of gas constant with be more.