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question_answer1) The water equivalent of a 400 g copper calorimeter (specific heat\[=0.1cal/g{}^\circ C\]) (in gm)
question_answer2) A copper block of mass 2.5 kg is heated in a furnace to a temperature of \[500{}^\circ C\]and then placed on large ice block. The maximum amount (in kg) of ice that can melt is (Specific heat of copper \[=0.39J{{g}^{-1}}{}^\circ {{C}^{-1}}\], latent heat of fusion of water\[=335J{{g}^{-1}}\])
question_answer3) Heat required to convert one gram of ice at \[0{}^\circ C\]into steam at \[100{}^\circ C\]is (in Calorie) (given\[{{L}_{steam}}=536\text{ }cal/gm,\,\,{{L}_{ice}}=80\text{ }cal/g\])-
question_answer4) Work done (in Joule) in converting one gram of ice at \[-10{}^\circ C\]into steam at \[100{}^\circ C\] is.
question_answer5) One gram of ice (at\[0{}^\circ C\]) is mixed with one gram of steam (at\[100{}^\circ C\]). After thermal equilibrium, the temperature (in\[{}^\circ C\]) of the mixture is.
question_answer6) The specific heat of a substance is given by \[C=a+bT,\]where \[a=1.12\text{ }kJk{{g}^{-1}}{{c}^{-1}}\] and \[b=0.016\text{ }kJ-kg\,\,{{c}^{-1}}{{k}^{-1}}\]. The amount of heat (in KJ) required to raise the temperature of 1.2 kg of the material form 280 K to 312 K is.
question_answer7) 5 g of steam at \[100{}^\circ C\] is passed into 6 g of ice at\[0{}^\circ C\]. If the latent heats of steam and ice are 540 cal/g and 80 cal/g, then the final temperature is (in\[{}^\circ C\]).
question_answer8) If there are no heat losses, the heat released by the condensation of x g of steam at \[100{}^\circ C\]into water at \[100{}^\circ C\] can be used to convert y g of ice at \[0{}^\circ C\]into water at\[100{}^\circ C\]. Then the ratio y: x is nearly.
question_answer9) 2 kg of ice at \[-20{}^\circ C\]is mixed with 5 kg of water at \[20{}^\circ C\]in an insulating vessel having a negligible heat capacity. Calculate the final mass (in kg) of water remaining in the container. It is given that the specific heats of water and ice are 1 kcal/kg/\[{}^\circ C\] and \[0.5\text{ }kcal/kg/{}^\circ C\]while the latent heat of fusion of ice is 80 kcal/kg.
question_answer10) The temperatures of equal masses of three different liquids A, B and C are\[12{}^\circ C\], \[19{}^\circ C\]and \[28{}^\circ C\]respectively, the temperature when A and B are mixed is 16 \[{}^\circ C\]and when B and C are mixed is 23\[{}^\circ C\], what would be the temperature when A and C are mixed? (in \[{}^\circ C\])
question_answer11) The surface of a pond of area\[50{{m}^{2}}\]is covered with ice at\[0{}^\circ C\]. If the earth receives 1400 watt of solar radiation per square meter and the ice reflects 90% of the radiation, how much ice will melt per hour? (in kg)
question_answer12) 0.020 kg of ice and 0.10 kg of water at\[0{}^\circ C\]are in container. Steam at 100 \[100{}^\circ C\]is passed until all the ice is just melted. How much water (in kg) is now in the container? (Latent heat of steam \[=2.3\times {{10}^{6}}J\,\,k{{g}^{-1}}\]; latent heat of ice \[=3.4\times {{10}^{5}}J\,\,k{{g}^{-1}}\]; specific heat capacity of water \[=4.2\times {{10}^{3}}J\,\,k{{g}^{-1}}\,\,{}^\circ {{C}^{-1}}\])
question_answer13) A certain amount of ice is supplied heat at a constant rate for 7 minute. For the first 1 minute, the temperature rises uniformly with time, then it remains constant for the next 4 minute and again rises at a uniform rate for the last 2 minute. Explain physically these observation and calculate the final temperature (in\[{}^\circ C\]). Latent heat of ice \[=336\times {{10}^{3}}J\,\,k{{g}^{-1}}\] and\[{{c}_{water}}=4200J\,\,k{{g}^{-1}}{{K}^{-1}}.\]
question_answer14) How many gram of ice at \[-14{}^\circ C\] are needed to cool 200 g of water from \[25{}^\circ C\] to\[10{}^\circ C\]? [\[{{c}_{ice}}=0.5cal/g{}^\circ C\] and \[{{L}_{F}}\]for\[ice=80\text{ }cal/g\]].
question_answer15) A calorimeter contains a mixture of 250 g of water and 200 g of ice at\[0{}^\circ C\]. The water equivalent of the calorimeter is 60 g. Now 300 g of steam at \[100{}^\circ C\]is passed through this mixture, then calculate the final temperature (in\[{}^\circ C\]) of the mixture [Latent heat of steam = 536 cal/g and Latent heat of\[ice=80\text{ }cal/g\]]
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