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Comprehensive Physics and Chemistry Problem Set: Heat Transfer, Electric Circuits, Wave Properties, and Radioactive Decay

A set of assignments covering topics in physics and chemistry such as heat transfer, electric circuits, and radioactive decay.

Benjamin Fisher
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Comprehensive Physics and Chemistry Problem Set: Heat Transfer, ElectricCircuits, Wave Properties, and Radioactive DecayLab Ex.61.How many calories of heat are required to change 1 gram of ice at 0°C to liquid water at0°C?Answer: 80calories.2.How many calories of heat are required to change 1 gram of water at 100°C to 1 gram of steam at100°C?Answer: 540 calories.3.How many calories are needed to melt 50 grams of ice at 0°C and convert it to liquid water at 35°C?Answer:•Heat to melt ice: 50 g × 80 cal/g = 4000 calories.•Heat to raise water from 0°C to 35°C: 50 g × 1 cal/g°C × 35°C = 1750 calories.4000 + 1750 = 5750 calories.4.For the irreversible transition of: 100 g H2O (s,-25°C) → 100 g H2O (v, +120°C) Calculate the totalamount of heat necessary to effect a set of reversible reactions for theses conditions.Answer:•Heat to warm ice from-25°C to 0°C: 100 g × 0.5 cal/g°C × 25°C = 1250 calories.•Heat to melt ice at 0°C: 100 g × 80 cal/g = 8000 calories.•Heat to raise water from 0°C to 100°C: 100 g × 1 cal/g°C × 100°C = 10000 calories.•Heat to vaporize water at 100°C: 100 g × 540 cal/g = 54000 calories.•Heat to raise steam from 100°C to 120°C: 100 g × 0.48 cal/g°C × 20°C = 960 calories.Total = 1250 + 8000 + 10000 + 54000 + 960 = 73,210 calories.5.In a steam radiator, steam at 110°C condenses and the liquid water formed is cooled to 80°C.Howmuch heat per gramof liquid formed, is released in this process?•Heat to condense steam: 1 g × 540 cal/g = 540 calories.

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