物態變化

物理 · 共 52 題 · 點擊選項即時核對答案

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51.

$0.10$ g of steam at $100^\circ\mathrm{C}$ is mixed with $0.10$ g of ice at $0^\circ\mathrm{C}$ . No heat is lost to the surroundings. Which of the following describes the final mixture ? Given : specific heat capacity of water $= 4.2\ \mathrm{kJ\,kg^{-1}\,{}^\circ C^{-1}}$ specific latent heat of fusion of ice $= 336\ \mathrm{kJ\,kg^{-1}}$ specific latent heat of steam $= 2260\ \mathrm{kJ\,kg^{-1}}$

52.

Cooling curves of liquids A and B: temperature against time, A with higher and longer plateau

Two liquids $A$ and $B$ are cooled in air. Their cooling curves are shown. If $A$ and $B$ have the same mass, which of the following statements is/are true ?

(1)

A

has a higher freezing point than

B

(2)

A

has a greater specific latent heat of fusion than

B

(3)Liquid

A

has a greater specific heat capacity than liquid

B