Question

L. Under that conditions of temperature and pressure would you expect gases to obey the ideal-gas equation? 2 Calculate the value of R in L-atm/mol-K by assuming that an ideal gas occupies 3 Why do you equalize the water levels in the bottle and the beaker? 5 What is the value of an error analysis? 224 Lmol at STP 4 Why does the vapor pressure of water contribute to the total pressure in the bottle? Suggest reasons why real gases might deviate from the ideal-gas law on the molecular level. At presence, automobile batteries are sealed. When lead storage batteries discharge, they produce hydrogen. Suppose the void volume in the battery is 100 mL at 1 atm of pressure and 25 C. What would be the pressure increase if 0.05 g 2 Ha were produced by the discharge of the battery? Does this present a problem? Why is the corrective term to the volume subtracted and not added to the volume How many moles of gas does this represent? CHINT: Use the value of R that you why sealed lead storage batteries were not used in the past? in the van der Waals equation? 9. A sample of pure gas at 20°C and 670 mm Hg occupied a volume of 562 cm found in question 2). A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100°C and 760 mm Hg. If the empirical formula of compound is CH, what is the molecular formula of this compound? gas would you expect to behave more like an ideal gas, Ne or HBr? Why

Answer 1

solution:

1).at Low Pressure, and high Temeprature

since they particles are veyr far form each other, therefore, no interactions between them

2).

PV = nRT

R = PV/(nT)

R = 1*22.4/273.15

R = 0.0820062 LAtm/molK

3).

in order to favour and ensoure equal volume and pressure

4).

according to dalton partial pressures are added

so   Ptotal = Pgas + Pvapor

       Pgas = Ptotal - Pvapor

thereofre, we need to account for vapor pressure

5).    most likely , incorrect measurment, Pressure calcualtion of real conditions apply

6).

they might:

attract between each other

disperce between each other