The saturated vapour pressure of a liquid increases as the
volume of the liquid increases
volume of the liquid decreases
temperature of the liquid increases
temperature of the liquid decreases
mass of the liquid decreases
Correct answer is C
No explanation has been provided for this answer.
The inside of a vacuum flask is usually coated with silver to reduce heat lost by
convection
conduction
radiation
absorption
evaporation
Correct answer is C
No explanation has been provided for this answer.
The heating element in an electric kettle is usually located near the bottom of the kettle because
water is a good conductor of heat
heat can be more quickly radiated to all parts of the water
no heat can be lost to the surroundings
the convectional currents which are set up can carry heat to all parts of the water
the molecules of the heating element can carry heat to all parts of the water.
Correct answer is D
No explanation has been provided for this answer.
336,000J
672,000J
8,704,000J
9,040,000J
9,376,000J
Correct answer is C
\(Q_{s} - Q_{w} = (4 \times 2260000) - (4 \times 4200 \times (100 - 80))\)
= \(9040000 - 336000\)
= \(8,704,000 J\)
80 Jkg-1K-1
320Jkg-1K-1
500Jkg-1K-1
1200J kg-1K-1
2000J kg-1K-1.
Correct answer is B
No explanation has been provided for this answer.