DiagramModerate1.5 marks
9(b)
The diagram below shows the change of phases of a substance on a temperature vs time graph on heating the substance at a constant rate.
What is the boiling and melting point of the substance ?
Topic: Heat and calorimetry
Previous-year question practice database
Answer
Exam answer
Melting point = t₁; boiling point = t₂, as marked on the graph.
More from Calorimetry
A metallic wire is stretched in such a way that its new length becomes twice the original length. How does its specific heat capacity change?
(a) becomes double
(b) becomes 4 times
(c) becomes 1⁄4 times
(d) remains the same2026Three substances A, B and C of same mass are present at their respective melting points. On heating, if they melt completely in 5 minutes, 7 minutes and 3 minutes respectively, then which substance has the highest specific latent heat?
(Assume heat is absorbed at the same rate)
(a) Substance A
(b) Substance B
(c) Substance C
(d) All the substances have same specific latent heat2026The lid of a calorimeter minimises heat loss by ............... [convection / radiation].2026A metal piece of thermal capacity 40 JK-1, absorbs 800 J of heat. Calculate the rise in the temperature of this metal piece.2026Atmospheric temperature after a hailstorm is greater than the temperature during the hailstorm. State True or False.2026Which thermal physical quantity of a frying pan changes by making its base heavier?2026