AP EAMCET · PHYSICS · Thermal Properties of Matter
\(1 \mathrm{~kg}\) of steam at \(150^{\circ} \mathrm{C}\) is passed from a steam chamber is to a copper coil immersed in \(20 \mathrm{~L}\) of water. The steam condenses in the coil and is returned to the steam chamber as water at \(90^{\circ} \mathrm{C}\). Latent heat of steam is \(540 \mathrm{cal} \mathrm{g}^{-1}\), specific heat of the steam is \(1 \mathrm{cal}\) and \(\mathrm{g}^{-1{ }^{\circ}} \mathrm{C}^{-1}\). Then, the rise in temperature of water is
- A \(75^{\circ} \mathrm{C}\)
- B \(60^{\circ} \mathrm{C}\)
- C \(30^{\circ} \mathrm{C}\)
- D \(20^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(C) \(30^{\circ} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
Mass of steam, \(m_s=1 \mathrm{~kg}=1000 \mathrm{~g}=10^3\) Temperature of steam, \(T_1=150^{\circ} \mathrm{C}\) Latent heat of steam, \(\begin{aligned} L_s & =540 \mathrm{cal} \mathrm{g}^{-1} \\ c & =1 \mathrm{cal} \mathrm{g}^{-1{ }^{\circ} \mathrm{C}^{-1}} \end{aligned}\) Heat…
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