Open ended Show ali work No work n rdsA 1 Shon answer A Briefy esplain the is 3.
ID: 564506 • Letter: O
Question
Open ended Show ali work No work n rdsA 1 Shon answer A Briefy esplain the is 3. Is water 1 OM NaC has a higher freezing rm peoins than 10M Cac 4. Copper conducts electricity but copper l sufate (Cuso (CuSO) does 5. The barometer falls when rain is coming and when climbing a mountain datareC is placed in a coffee cup calorimeter filled wi h secithe B, A piece of hot metal at 100rC a coffee cn the e water. The data for the experiment is given bere the heat ai determine the specific heat of below, Use this data to Mass of cup 2.50g Mass of cup + water + C (water) 4.183/g'C Mass of cup+ water- 6555 Initial temp. of water-220C Final temp. of metal/water mixture 26Explanation / Answer
1.
CH4 is not soluble in water as it is non-polar and we know that like dissolves like while methanol is polar and hence dissolves in water.
2.
true as the intermolecular force between molecules is very less in molecular solids compared to ionic compounds as it has very high intermolecular force to bind each other
3.
depression in freezing point depends on no. of particles
NaCl dissolve in water to form 2 ions
CaCl2 will give two ions 1 Ca2+ + 2Cl- and hence more depression in freezing point
4.
Cu has free electrons and hence it conducts electricity,while CuSO4(s) does not have free electrons or ions in solid state
5.
when rain is coming,usually there is high speed wind and with high speed wind,pressure decreases and same happens with altitude ,as it rises the mountain and hence the pressure decreases.
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