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 …………………..
a) 1 Joule
b) 1 calorie
c) 1 K. calorie
d) 4180 J
A) a, b
B) a,c
C) c,d
D) a, c, d
1 Answers
i. Dissolve a given amount of sugar in minimum amount of water at room temperature.
Observation : Sugar crystals separate out. Inference : The sugar syrup solution prepared is a saturated solution. Therefore, Additional amount of sugar cannot be dissolved in it at room temperature. In a saturated solution, There exists...
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If the temperature of 4 kg mass of a material of specific heat capacity 300 J/ kg °C rises from 20 °C to 30 °C. Find the heat received.
m = 4 kg, s = 300 J/kg °C ∆T = 30 – 20 = 10 °C To find: Heat received (Q) Formula: Q = ms∆T Calculation: From formula, Q = 4 × 300 ×...
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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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The amount of heat required to raise the temperature of 1 gm of water to 1°C is ………….. (in Jouls)
Correct option is A) 4.186
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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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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 amount of heat energy absorbed by ice at E
Correct option is D) 730 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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