The amount of heat energy absorbed by ice at E
A) 10 cal
B) 90 cal
C) 190 cal
D) 730 cal
1 Answers
For some change in temperature the amount of heat absorbed by a substance is directly proportional to …………………
Correct option is A) mass
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1 gm of water at 20°C is heated till its temperature raises to 21 °C. The amount of heat energy absorbed by the water is ………………..
Correct option is B) 1 calorie
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1 kg of water at 300 K is heated till its temperature raises to 301K. The amount of heat energy absorbed by the water is …………………..
Correct option is C) c,d
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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 amount of heat needed to change from ice to water at 0° C is 80 cal. Find the mass of the substance taken.
Correct option is B) 1 g
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What amount of ice can be melted by 4000 cal of heat ?
Correct option is D)50g
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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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Which of the following can convert the absorbed (Solar energy) sunlight into chemical energy ?
C) Producers
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