How many kilograms of water must evaporate from a 63.2 kg woman to lower her body temperature by 0.668°C? The latent heat of vaporization for water at 37°C is 580 kcal/kg and the specific heat of the body at 37°C is 0.83 kcal/(kg · °C). kg
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- A parcel of air with a volume of 9.3 x 10 km that contains 4.8 x 10 kg of water vapor rises to an altitude where all the water in the parcel condenses and then freezes. What is the change in temperature of the parcel of air due to freezing? Assume the density of air at the condensation altitude is 7.2 x 10 g/m. The specific heat of air is 0.17 cal/g Co, the latent heat of vaporization of water is 540 cal/g, and the latent heat of fusion of water is 80 cal/g.) Express the answer in standard seientific nötation. AT= x 10A large steam pipe is covered with a 4.80 cm thick insulating material with a thermal conductivity of 0.17 W/(m°C). How much energy is lost every second when the temperature of the steam inside the pipe is at 265 °C and the temperature outside of the pipe is 13.0 °C? The pipe has a diameter of 3.70 m and a length of 185 m. Neglect losses through the ends of the pipe. 3863.3 JWrite the Hamilton expression for a polyatomic molecule using the Born-Oppenheimer approximation.
- A 520.gram block of ice is at -28.0°C . What is the final temperature, how much ice is there, and how much water is there, if 1.40x10J of heat are added to it? Given that the specific heat capacity of liquid water is 4186J/(kg °C) , the specific heat capacity of ice is 2.00x10 J/(kg °C), the latent heat of vaporization of water is 2.26x106J/kg , and the latent heat of fusion of water is 3.35×10°J/kg.In a physics lab, students are conducting an experiment to learn about the heat capacity of different materials. The first group is instructed to add a number of 1.50 g pellets made of lead, at a temperature of 92.0°C, to 305 g of water at 16.0°C. A second group is given the same number of 1.50 g pellets as the first group, but these are now aluminum pellets. Assume that no heat is lost to or gained from the surroundings for either group. (a) If the final equilibrium temperature of the lead pellets and water is 25.0°C, how many whole pellets did the first group use in the experiment? The specific heat of lead is 0.0305 kcal/(kg · °C). pellets (b) Will the final equilibrium temperature for the second group be higher, lower, or the same as for the first group? The specific heat of aluminum is 0.215 kcal/(kg · °C). O higher O lower O the same (c) What is the equilibrium temperature of the aluminum and water mixture for the second group? °CA copper block is removed from 335°C oven and immediately dropped into 1 L of water at 20°C.in an insulated cup. The water quickly reaches 24.45°C and then remains at that temperature. Calculate the following: a) Mass of water in grams b) The heat energy supplied to water by the copper block in joules (Sp.Heat of water = 4186 J/kg°C) c) The mass of copper block in grams (Sp.Heat of copper is 385 J/K9°C)
- You wish to cool a 1.59 kg block of tin initially at 96.0°C to a temperature of 57.0°C by placing it in a container of kerosene initially at 28.0°C. Determine the volume (in L) of the liquid needed in order to accomplish this task without boiling. The density and specific heat of kerosene are respectively 820 kg/m³ and 2,010 J/(kg °C), and the specific heat of tin is 218 J/(kg °C). L Need Help? Read ItIf you have 0.251 m³ of water at 25.0 °C in an insulated container and add 0.112 m³ of water at 95.0 °C, what is the final temperature T; of the mixture? Use 1000 kg/m³ as the density of water at any temperature. °C Tf =2.4 g of water was evaporated from the surface of skin. How much heat, in the unit of kJ, was transferred from the body to the water to evaporate the water completely? The temperature of the skin is 33.5°C, and the latent heat of vaporization of water at 33.5°C is 43.6 kJ/mol. Molar mass of water is 18 g/mol
- A heavy pot made of copper has a mass of 2.07 kg (including the lid) and is heated in an oven to a temperature of 155 °C. You pour 0.10 kg of water at 25.6 °C into the pot and quickly close the lid so that no steam can escape. We assume that no heat is lost to the surrounding. For copper, Ccopper 390 J/(kg.K) = For water, Cwater = 4190 J/(kg.K), Lv = 2256 kJ/kg, Lƒ = 333 kJ/kg. What is the final mass of steam in the pot? gA bar of pure gold is heated to 105.0 °C. The specific heat capacity of gold is 1.29x10² J/1kg~°C). The gold is placed into 600.0 mL of ethyl alcohol initially at a temperature of 35.0 °C. The final temperature of the mixture is 37.0 °C. What is the mass of the gold?Problem 2: 0.4 kg of ice at – 10°C are mixed with 0.2 kg of water at 50°C. The water and ice are mixed in a calorimeter so that no heat escapes the system. The specific heat of ice is c; = 2090 J/(kg.°C), the la- tent heat of fusion of water is Lf = 3.33× 10° J/kg, and the specific heat of water is cu = 4186 J/(kg-°C). (a) What is the final temperature of the system? (b) How many kg of ice remain in the end? (c) How many kg of water remain in the end?