06:46Thermodynamics: Calculating Latent and Specific Heat, Example ProblemStep by Step Science804views1rank
05:56Physics - Thermodynamics: Intro to Heat & Temp (6 of 6) Change of Phase & Latent HeatMichel van Biezen383views
Multiple ChoiceHow much heat must be removed from 0.7 kg of water at 23°C to cool it to 0°C and completely freeze it?495views10rank1comments
Multiple ChoiceHow much heat is needed to change 1.0L of liquid water at 20°C into steam at 100°C?260views
Textbook QuestionA 5.0 g ice cube at −20°C is in a rigid, sealed container from which all the air has been evacuated. How much heat is required to change this ice cube into steam at 200°C? Steam has cV=1500 J/kg K and cP=1960 J/kg K.432views
Textbook Question"(II) High-altitude mountain climbers do not eat snow, but always melt it first with a stove. To see why, calculate the energy absorbed from your body if you (b) melt 1.0 kg of -15°C snow using a stove and drink the resulting 1.0 kg of water at 2°C, which your body has to warm to 37°C."126views
Textbook Question(II) An iron boiler of mass 180 kg contains 710 kg of water at 18°C. A heater supplies energy at the rate of 58,000 kJ/h. How long does it take for the water(b) to all have changed to steam?104views
Textbook QuestionCalculate what will happen when 1000 J of heat is added to 100 grams of(c) water at 10°C 112views
Textbook QuestionAn asteroid with a diameter of 10 km and a mass of 2.60*10^15 kg impacts the earth at a speed of 32.0 km/s, landing in the Pacific Ocean. If 1.00% of the asteroid's kinetic energy goes to boiling the ocean water (assume an initial water temperature of 10.0°C), what mass of water will be boiled away by the collision? (For comparison, the mass of water contained in Lake Superior is about 2*10^15 kg.)740views
Textbook QuestionAn ice-cube tray of negligible mass contains 0.290 kg of water at 18.0°C. How much heat must be removed to cool the water to 0.00°C and freeze it? Express your answer in joules, calories, and Btu731views
Textbook QuestionWhen air is inhaled, it quickly becomes saturated with water vapor as it passes through the moist airways. Consequently, an adult human exhales about 25 mg of evaporated water with each breath. Evaporation—a phase change—requires heat, and the heat energy is removed from your body. Evaporation is much like boiling, only water's heat of vaporization at 35°C is a somewhat larger 24×10^5 J/kg because at lower temperatures more energy is required to break the molecular bonds. At 12 breaths/min, on a dry day when the inhaled air has almost no water content, what is the body's rate of energy loss (in J/s) due to exhaled water? (For comparison, the energy loss from radiation, usually the largest loss on a cool day, is about 100 J/s.)373views
Textbook QuestionAn experiment measures the temperature of a 500 g substance while steadily supplying heat to it. FIGURE EX19.20 shows the results of the experiment. What are the (d) heats of fusion and vaporization?171views
Textbook QuestionWhat is the maximum mass of ethyl alcohol you could boil with 1000 J of heat, starting from 20°C?299views
Textbook QuestionCalculate what will happen when 1000 J of heat is added to 100 grams of(d) water at 100°C, and88views
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