1) Indicate how each of the following errors would affect(increase, decrease, or

Q: 1) Indicate how each of the following errors would affect(increase, decrease, or

a) if Vapor pressuer was not siubstracted P-O2 = is higher than it should be then PV = nRt V/n = RT/P V/n increases, mainly becaus eof the moles calculation is relate dincorrectly, moles of O2 will be less then the molar volume decreases b) if black soot is formed, there is carbonization, that is, there is extra matter converted to solid, therefore not enough gas wil be present then Vmolar decreases

ID: 592599 • Letter: 1

Question

1) Indicate how each of the following errors would affect(increase, decrease, or no change) your calculated value for the molar volume of O2 at STP (assuming that you complete the experiment otherwise correctly). In each case, explain your answer.

a. you forgot to subtract the vapor pressure of water in determining the pressure of O2

b. while heating your sample in the test tube your flame was improperly adjusted so that the black soot formed on the outside of the test tube and did not remove before being weighed

Explanation / Answer

if Vapor pressuer was not siubstracted

P-O2 = is higher than it should be

then

PV = nRt

V/n = RT/P

V/n increases, mainly becaus eof the moles calculation is relate dincorrectly, moles of O2 will be less

then the molar volume decreases

if black soot is formed, there is carbonization, that is, there is extra matter converted to solid, therefore not enough gas wil be present

then

Vmolar decreases

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1) Indicate how each of the following errors would affect(increase, decrease, or

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