A block of ice at -10 ∘C is slowly heated and converted to steam at 100 ∘C. Which of the following curves represents the phenomenon correctly?
A block of ice at -10 ∘C is slowly heated and converted to steam at 100 ∘C. Which of the following curves represents the phenomenon correctly?
The correct option is A
The change of ice at -10 ∘C into steam at 100 ∘C occurs in four stages; it is represented by curve (a).
I stage – The temperature of ice changes from -10 ∘C to 0 ∘C.
II Stage – Ice at 0 ∘C changes to water at 0 ∘C
The state changes as heat is supplied.
III Stage – Water at 0 ∘C changes into water at 100 ∘C.
IV Stage – Water at 100 ∘C changes into steam at 100 ∘C.
Here, the flat regions II and IV represent the latent heat of fusion and latent heat of vaporization, respectively. In these stages, there will be a phase change of ice to water and water to vapour at a constant temperature of 0 ∘C and 100 ∘C respectively. No change in temperature would be observed in these stages.
The change of ice at -10 ∘C into steam at 100 ∘C occurs in four stages; it is represented by curve (a).
I stage – The temperature of ice changes from -10 ∘C to 0 ∘C.
II Stage – Ice at 0 ∘C changes to water at 0 ∘C
The state changes as heat is supplied.
III Stage – Water at 0 ∘C changes into water at 100 ∘C.
IV Stage – Water at 100 ∘C changes into steam at 100 ∘C.
Here, the flat regions II and IV represent the latent heat of fusion and latent heat of vaporization, respectively. In these stages, there will be a phase change of ice to water and water to vapour at a constant temperature of 0 ∘C and 100 ∘C respectively. No change in temperature would be observed in these stages.
