The working equation for this is:
Tbp,soln - Tbp,water = i*Kb*m
where
Kb for water is 0.512 °C/molal
m is the molality (mol solute/kg solvent)
i is the van't hoff factor which represents the number of ions dissociated for strong electrolytes
Tbp,water is the boiling point of water which is 100°C
1. <span>1.50 moles of lioh (strong electrolyte) and 3.00 moles of koh (strong electrolyte) each in 1.0 kg of water
i = 2 for LiOH and 2 for KOH
Then,
</span>Tbp,soln - 100 = (2+2)(0.512)((1.5+3)/1 kg)
Tbp,soln = 109.22°C
<span>
2. </span><span>0.40 mole of al(no3)3 (strong electrolyte) and 0.40 mole of cscl (strong electrolyte) each in 1.0 kg of water
</span>
i = 4 for al(no3)3 and 2 for cscl
Then,
Tbp,soln - 100 = (4+2)(0.512)((0.4+0.4)/1 kg)
Tbp,soln = 102.46°C
<em>Thus, the first solution will have a higher boiling point.</em>
Answer:
14.8 g/mol
Explanation:
Starting on the left, count in 3 numbers (14.8), then round using the next number (0.02).
Because 2 is less than 5, the number stays the same and is not rounded up.
Answer:
82.74 kJ/mol
Explanation:
Mass of Water = 100 mL == 100 g
Mass of CaCl₂ = 3 g
Total solution mass = H₂O mass + CaCl₂ mass = 103 g
Heat capacity is same as that of water 4.184 J/g °C
∴ Heat released on dissolution = Mass x Specific heat x ΔTemperature
= 103 g x 4.184 J/g °C x 5.19 °C
= 2236.64 J
Molar mass of CaCl₂ = 110.98 g/mol
∴ Heat released on dissolution of a mol of CaCl₂
= (2236.64 J / 3.0 g) x 110.98 g/mol
= 82740.769 J/mol
In KiloJoules = 82.74 kJ/mol
Answer:
Explanation:
From the question we are told that:
Energy state
Time
Generally the equation for energy of Photon is mathematically given by
Generally the equation for Wave-length of Photon is mathematically given by
Answer:
The correct answer will be options-A and C.
Explanation:
The research on any question starts with a "review of literature study" which helps gain the knowledge related to the aspect of the hypothesis one is studying.
The sources reviewed by the researcher must follow certain criteria to be cited like:
1. The research should be done by any governmental organisation, research institutes and affiliated universities.
2. The research paper should posses results checked and verified by the peer fellows like by the peer-review of journals.
3. The research should not be edited any general magazines, advertisements and any other unauthorized organizations.
Thus, option-A and C are the correct answer.