Predict the substance with the greater intermolecular force in each pair 10 A) C
ID: 874911 • Letter: P
Question
Predict the substance with the greater intermolecular force in each pair 10 A) CO2 B) CO 11 A) HF B) HBr 12 B) Cs (aqo 13 A) CH B) CF4 14 A) C6H6 B) 10H14 A) cis-C2H2 Cl2 15 B) trans-C2H2012 16. The specific heat of water is 4.18 J/goc. hen equal masses of iron at 100oC and water at 20o Care combined in a calorimeter, the final temperature is 23oC Compared to water, the specific heat of iron is A less B) greater C) the same D) impossible to predict 17. In 0.10 M Al(NO3)3 the [NO3 is C) 0.40 M B) 0.30 M A) 0.10 M 18. The rate of effusion of I20g compared to Br20g, at the same temperature, would be D) impossible to predict C) the same B) less A) greater 19. The average kinetic energy of I20g) compared to Br20g, at the same temperature, would be D) impossible to predict C) the same B) less A) greater 20. The root mean square speed of I20g compared to Br20g, at the same temperature, would be C) the same D) impossible to predict A) greater B) lessExplanation / Answer
Solution :-
Q 10 when the molecules are polar then they have greater intermolecular forces , when bonds are polar but overall molecule is non polar because of the planar symmetric structure then it also has lower intermolecular forces.
CO > CO2 because CO2 is non polar molecule while CO is polar molecule
HF > HBr because F is more electronegative so the bond is more polar than HBr bond
Li+ > Cs+ because Li+ is smaller cation than Cs+ so it can have more interactions with the water
CF4> CH4 though both are non polar but the C-F bond is polar bond and also the molar mass of CF4 is larger than CH4
C10H14 > C6H6 because larger molar mass and more unsaturations
Cis-C2H2Cl2 > trans-C2H2Cl2 because cis is polar and trans is non polar because dipole moment is cancelled out in trans isomer.
Q 16 Answer is option A = less
Because the temperature of water changes by very small amount than temperature change in iron that means specific heat of iron is less than specific heat of water.
Q17 correct answer is option B
using the mole ratio of the Al3+ and NO3- in 0.10 M Al(NO3)3 we can calculate concentration of the NO3-
(0.10 M Al(NO3)3 * 3 mol NO3-) / 1 mol Al(NO3)3 = 0.30 M NO3-
Q 18 Correct answer is option B
Because molar mass of I2 is larger than molar mass of Br2
The molar mass and rate of effusion are inversely proportional therefore I2 effuses less than Br2 at same temperature
Q19 correct answer is option C
Because at same temperature the average kinetic energy of the all gases is same
Q20 Correct answer is option B
Because the root mean square speed is inversely proportional to molar mass therefore I2 have less root mean square speed than Br2