The vapor pressure of a liquid is 2.34 mmHg at 23 degree C. The vapor pressure i
ID: 1011302 • Letter: T
Question
The vapor pressure of a liquid is 2.34 mmHg at 23 degree C. The vapor pressure increases to 5.20 mmHg at 30 degree C. Determine enthalpy of vaporization of the liquid. 80280 J/mol 78290 J/mol 82280 J/mol 85270 J/mol 90253 J/mol_____What is the osmotic pressure of aqueous solution of 0.352 M K_2SO_4 at 25 degree C? 25.82 atm 2616 atm 2735 atm 8.61 atm 23.82 atm_____A plot of ln P vs 1/T for a liquid gave a straight line with slope - 2015 kelvin. What is the enthalpy of vaporization of the liquid? 165.3 J/mol 172.3 J/mol 201.5 J/mol 16.75 kJ/mol 18.95 kJ/mol_____The osmotic pressure of 250 ml of aqueous solution of 2.305 g of an enzyme was observed to be 3.20 torr at 25 degree C. Determine molar mass of the enzyme. 704.5 g/mol 7138 g/mol 48235 g/mol 5425 g/mol 53541 g/mol_____What is the freezing point of 1.32 m BaCl_2 aqueous solution? The freezing point depression constant for water is 1.86 degree C/m. -2.46 degree C -7.36 degree C -4.12 degree C -5.13 degree C -7.85 degree C_____Consider the following data for the reaction rate of: A + 3B ------ 2C What is the value of the Rate constant for the reaction? 5.25 1.31 1.05 0.525 0.131_____How many atoms are there in a face center cubic unit cell of a metal? 6 8 4 2 3_____Which of the following is a covalent network solid? Rubber Margarine Diamond C_5H_12 C_6H_8O_6_____Consider the reaction: 3 A + 2 B ------ 2C + D If the rate of consumption of A is 0.60 mol.L^-1s^-1, then what is the rate of formation of C? 0.90 0.60 0.40 0.50 0.80_____(all units arc moI.L^1 s^-1) A 15.40 g of covalent compound was dissolved in 60.40 g benzene. The solution boils at 86.2 degree C. What is the molar mass of the compound? The normal boiling point of benzene is 81.1 degree C. The boiling point elevation constant for benzene is 2.53 degree C/m. 126.5 g/mol 25.5 g/mol 51.0 g/mol 63.3 g/mol 151.0 g/mol_____(Gas constant R = 0.08205 L.atm/mol.k; R = 8.314 J/mol.K; latm = 760 torr)Explanation / Answer
12. Osmotic pressure= CRT
where C is the conc= 0.352 M
R is gas constant= 0.0821 Latm K-1 mol-1
T is the temperature= 25 C = 298 K
Osmotic pressure= 0.352 x 0.0821 x 298= 8.61 atm
17. FCC (face centred cubic) lattice has 8 atoms on corners and 6 atoms on the face
Contribution by atoms on the corner= 1/8 x 8=1
Contribution by atoms on the faces= 1/2x6= 3
Number of atoms present in unit cell= 1+ 3= 4
So correct option is C.
18. Diamond has a covalent network. Each carbon is bonded to other four carbon covalently forming a rigid solid
So correct option is C
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