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Answer:
See below.
Step-by-step explanation:
An incandescent lamp produces all colours of the visible spectrum, with wavelengths ranging from approximately 400 nm (violet) to 700 nm (red).
Since <em>energy is inversely proportional to wavelength</em>,
E ∝ 1/λ
a quantum of 400 nm violet light has more energy than one of 700 nm red light.
An incandescent lamp produces a relatively small amount of the high-energy blue/violet light ( see image below).
The table below gives the colours in the visible spectrum, ranked from highest to lowest energy.
<u>Colour λ/nm </u>
Violet 400 – 450
Blue 450 – 490
Cyan 490 – 520
Green 520 – 560
Yellow 560 – 590
Orange 590 – 635
Red 635 – 700
Answer: 367 grams
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number of particles.
Enthalpy of vaporization is the amount of heat released when 1 mole of substance is converted from liquid to gaseous state.
Given : Enthalpy of vapourization of = 17.4 kJ/mol
To calculate the number of moles, we use the equation:
1 mole of produces heat = 17.4 kJ
8.3 moles of produces heat =
Given : Enthalpy of vapourization of = 6.0 kcal/mol =
(1kcal=4.184kJ)
25.104 kJ heat is produced by = 1 mole of
144 kJ heat is produced by = of
Mass of
Thus 367 grams of must be evoparated o remove as much heat as evaporation of 1.00 kg of