The latent heat of fusion of ice is …………………
A) 80 cal/gm
B) 540 cal/gm
C) 0°C
D) 100° C
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Energy produced in nuclear fusion is much larger than that produced in nuclear fission. Why is it difficult to use fusion to produce energy ?
Nuclear fusion involves the fusion of lighter nuclei to form a heavy nucleus which is accompanied by an enormous amount of energy (heat). Fusion reaction requires extremely high temperature typically of...
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Explain the following terms. (i) Latent heat of fusion (ii) Latent heat of vaporisation
1. Latent heat of fusion: The quantity of heat required to convert unit mass of a substance from its solid state to the liquid state, at its melting point, without any...
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Explain why latent heat of vaporisation is much larger than latent heat of fusion.
1. The energy required to completely separate the molecules or atoms in liquids is greater than the energy needed to break the rigidity (rigid bonds between the molecules or atoms)...
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Calculate the amount of heat energy to be supplied to convert 2 kg of ice at 0 °C completely into water at 0 °C if latent heat of fusion
Mass (m) = 2 kg = 2 × 103 g. latent heat of fusion for ice (L) = 80 cal/g. To find: Heat energy (Q) Formula: Q = mL From formula, Q = 2 × 103 ×...
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The latent heat of vapourization of liquid of “m”gm when the heat energy of “Q” calories is supplied to change its state from liquid to gas is ………………
Q = mL so, L = Q/m. Hence, the correct option is (B) Q/m
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The latent heat of vapourization of liquid of “m”gm when the heat energy of “Q” calories is supplied to change its state from liquid to gas is ………………
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S.I unit of latent heat of fusion is
Correct option is B) J/Kg
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The latent heat of fusion of a solid ‘ substance of mass “m” is L. The required amount of heat to change solid phase to liquid phase is ……………… cal.
Correct option is A) Q = mL
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A piece of ice falls from a height h so that it melts completely. Only one — quarter of the heat produced is absorbed by the ice and all energy
(A) 136 km When the piece of ice falls from the height h, it possesses potential energy, mgh. This P.E. is converted to heat energy. ∴ Q = mgh But only \(\frac{1^{th}}{4}\) of it is absorbed...
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How long can an electric lamp of 100 W be kept glowing by fusion of 2 kg of deuterium? Take the fusion reaction as
Number of atoms present in 2 g of deuterium = 6 × 1023 Number of atoms present in 2.0 Kg of deuterium = 6 × 1026 Energy released in fusion of 2...
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