How much heat energy is required to convert 1 gm of ice to liquid
A) 540 cal
B) 80 cal
C) 100 cal
D) 373 cal
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Fill in the blanks The temperature at which a liquid convert to gaseous state is called ________ of a liquid.
Correct Answer - boiling point
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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 heat energy required to change 1gm of liquid to gas at constant temperature is called …………………..
B) latent heat of vapourization
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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 ………………
2 Answers
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The heat energy required to convert 1 gm of solid completely into liquid at a constant temperature is called ……………….
C) latent heat of fusion
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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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Calculate the amount of heat required to convert 5 gm of ice at 0° C to water at 100° C.
Correct option is A) 900 cal
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Calculate the amount of heat required to convert 100 g of ice at – 5° C to 0° C.
Correct option is B) 250 cal
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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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