Answer:
Temperature of boiling point for solution is 101.60°C
Explanation:
This colligative property is boiling point elevation.
ΔT = Kb . m . i
ΔT = T° boiling point for solution - T° boiling point for pure solvent
Kb = The molal boiling point constant
m = molality
i = Van't Hoff factor ( for NaCl i = 2)
NaCl → Na⁺ + Cl⁻
Let's calculate molality (mol of solute in 1kg of solvent)
Mol of salt = Salt mass / Salt Molar mass
Mol of salt = 45 g / 58.45 g/m → 0.769 moles
0.769 moles/0.5 kg = 1.54 m
T° boiling point for solution - 100°C = 0.52°C/m . 1.54m . 2
T° boiling point for solution = (0.52°C/m . 1.54m . 2) + 100°C
T° boiling point for solution = 101.60°C
Answer:
C = 9460 Kj
Explanation:
Given data:
Mass of copper = 2kg
Latent heat of vaporization = 4730 Kj/Kg
Energy required to vaporize 2kg copper = ?
Solution:
Equation
Q= mLvap
by putting values,
Q= 2kg × 4730 Kj/Kg
Q = 9460 Kj
Answer:
A food chain shows how energy is transferred from one living organism to another via food. ... When these animals eat these plant products, food energy and organic compounds are transferred from the plants to the animals.
They all share the same atomic number (number of protons)