Advertisements
Advertisements
Question
Why do bottled soft drinks get cooled, more quickly by the ice cubes than by the iced water, both at 0℃?
Advertisements
Solution
This is because 1 g of ice at 0oC takes 336 J of heat energy from the bottle to melt into water at 0oC. Thus, bottle loses an additional 336 J of heat energy for 1 g of ice at 0oC than for 1 g iced water at 0oC. Therefore, bottled soft drinks get cooled, more quickly by the ice cubes than by iced water.
RELATED QUESTIONS
Heat supplied to a solid change it into liquid. What is this change in the phase called?
Why do the farmers fill their fields with water on a cold winter night?
Find the time taken by a 500 W heater to raise the temperature of 50 kg of material of specific heat capacity 960 J kg-1K-1, from 18°C to 38° C. Assume that all the heat energy supplied by the heater is given to the material.
What is meant by global warming?
Define heat capacity.
Fill in the following blank using suitable word:
SI unit of heat is .........
Write an expression for the heat energy liberated by a hot body.
State factors on which the amount of heat radiated by a body depends.
If 'f' is the number of degrees of freedom of a molecule of a gas and ratio of molar specific heats of a gas, ϒ = 1 + `2/"f"` where ϒ = Cp/Cv. The ratio of 'ϒ' for monoatomic gas to 'ϒ' for (rigid) f diatomic gas is ______.
Two cylinders of equal height and radius are made of copper and aluminum. Which of them conducts heat faster?
