A 60 cm3 block of iron is removed from an 800∘C furnace and immediately dropped into 200 mL of 20∘C water. What percentage of the water boils away?
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A 60 cm3 block of iron is removed from an 800∘C furnace and immediately dropped into 200 mL of 20∘C water. What percentage of the water boils away?
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- A 100-g piece of copper, initially at 95.0C, is dropped into 200 g of water contained in a 280-g aluminum can; the water and can are initially at 15.0C. What is the final temperature of the system? (Specific heats of copper and aluminum are 0.092 and 0.215 cal/g C. respectively.) (a) 16C (b) 18C (c) 24C (d) 26C (e) none of those answersBeryllium has roughly one-half the specific heat of water (H2O). Rank the quantities of energy input required to produce the following changes from the largest to the smallest. In your ranking, note any cases of equality, (a) raising the temperature of 1 kg of H2O from 20C to 26C (b) raising the temperature of 2 kg of H2O from 20C to 23C (c) raising the temperature of 2 kg of H2O from 1C to 4C (d) raising the temperature of 2 kg of beryllium from 1C to 2C (e) raising the temperature of 2 kg of H2O from -1C to 2CHow long does it take a 750-WW coffeepot to bring to a boil 0.85 LL of water initially at 18 ∘C∘C? Assume that the part of the pot which is heated with the water is made of 360 gg of aluminum, and that no water boils away. Ignore the heat loss to the surrounding environment. The value of specific heat for water is 4186 J/kg⋅C∘J/kg⋅C∘ and for aluminum is 900 J/kg⋅C∘J/kg⋅C∘.
- Specific heats can be measured in a drop calorimeter in which a heated sample is dropped into the calorimeter and the final temperature is measured. When 40.0 g of a certain metal at 75.0 oC is added to 25.0 g of water (with Cp=4.184 J/[g oC]) at 10.0 oC in an insulated container, the final temperature is 20.0 oC. (A) Find the specific heat capacity of the metal. (B) How much heat flowed from the metal to the water.A 50g ice cube at 0 0C is heated until 45ghas become water at 100 oC and 5g has become steam at100 oC . Determine the amount of heat that will be added to accomplish this [ Cwater =4186 Jkg_1 , Lv= 2.26*106 Jkg -1 , Lf = 3.133 *105 Jkg_1How long does it take a 750-WW coffeepot to bring to a boil 0.85 LL of water initially at 18 ∘C∘C? Assume that the part of the pot which is heated with the water is made of 360 gg of aluminum, and that no water boils away. Ignore the heat loss to the surrounding environment. The value of specific heat for water is 4186 J/kg⋅C∘J/kg⋅C∘ and for aluminum is 900 J/kg⋅C∘J/kg⋅C∘. Express your answer using two significant figures. In seconds
- 25.0 gg of copper pellets are removed from a 300∘C∘C oven and immediately dropped into 80.0 mLmL of water at 25.0 ∘C∘C in an insulated cupSolve the problem: You wish to prepare an ice less cold drink by mixing 100g of green coffee at 67 oC and 18 g of ice at -8 oC. What would the temperature (in degree Celcius) of your cold coffee once you are done? (specific heat of green coffee is 1400 J/kg K).A lead rod has a Volume of 148.7 cubic meter when the temperature is 11.9°C. khat is its volume (in cubic meter) when the temperature is 67:4°C? ti todt newid nly Swezing wilt tul Coefficient of linear expansion of lead = 29 x 10-60-² starting tidus al ene To smilov MX (1) LY (58) M THE ra = 939 J-PPI = V 9 ck 49
- “Pre-Lab Questions” “Water and steam are both 100°C when water is boiling, but a burn from steam is worse than a burn from the water. Hypothesize why this is true.” “A 10 g ice cube, initially at 0 ºC, is melted in 100 g of water that was initially 20°C. After the ice has melted, the equilibrium temperature is 10.93 ºC. Calculate:” “The total heat lost by the water (the specific heat for water is 4.186 J/g/K).” “The heat gained by the ice cube after it melts (the specific heat for ice is 2.093 J/g/K).” “The heat it took to melt the ice (Hint: it takes 334 J of heat energy to melt 1 g of ice).” “Inside a calorimeter is 100 g of water at 39.8°C. A 10 g object at 50°C is placed inside of a calorimeter. When equilibrium has been reached the new temperature of the water and metal object is 40°C. What type of metal is the object made from?” “Experiment 1: Latent Heat” “Table 2: Temperature of Frozen Water Over Time” “Time (s)” “Temperature (°C)”…Car manufacturers are developing engines that use H2 asfuel. In Iceland, Sweden, and other parts of Scandinavia, wherehydroelectric plants produce inexpensive electric power, the H2 can be made industrially by the electrolysis of water(a) How many coulombs are needed to produce 3.5x10^6L of H2 gas at 12.0 atm and 25°C? (Assume the ideal gas law applies.)(b) If the coulombs are supplied at 1.44 V, how many joules areproduced?(c) If the combustion of oil yields 4.0x10^4kJ/kg, what mass ofoil must be burned to yield the number of joules in part (b)?A 50 g ice cube, initially at -20degree C, is dropped into 200g of water in an 80g aluminum container, both initially at 40C. What is the final equilibrium temperature of the mixture after all the ice has melted? (CAl=0.0215 cal/g*C, Cw=1, Cice=0.5, Lf for water =80cal/g