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How much would the temperature (in °C) of 263 g of water at 25°C increase if 33.9 kJ of heat were added? Answer needs to be in the correct number of significant figures. Thank you!
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- After heating up in a teapot, a cup of hot water is poured at a temperature of 209°F. The cup sits to cool in a room at a temperature of 68°F. Newton's Law of Cooling explains that the temperature of the cup of water will decrease proportionally to the difference between the temperature of the water and the temperature of the room, as given by the formula below: T = Ta + (To – Ta)e¬kt - the temperature surrounding the object %3D To = the initial temperature of the object t = the time in minutes T = the temperature of the object after t minutes k = decay constant The cup of water reaches the temperature of 185°F after 1.5 minutes. Using this information, find the value of k, to the nearest thousandth. Use the resulting equation to determine the Fahrenheit temperature of the cup of water, to the nearest degree, after 4 minutes.What is the temperature in °C of 4.92 L of water at 30°C after 999.04 calories of heat have been added? (Express your answer in 2 decimal place, no unit required)Aluminum has a specific heat of 0.902 J / g. °C. How many joules of heat are required to change the temperature of 7.3 grams of aluminum from 25.0 °C to 94.7 °C? Round off your answer to three significant figures. Write your calculations in a piece of paper. You will upload a clear photo of your calculations right after you finish the Exam. Answer:
- The specific heat of liquid mercury is 0.140 J g1 c-1. How many joules of heat are needed to raise the temperature of 16.94 g of mercury from 15.0 °C to 34.2 °C? Keep the answer with 2 decimal places. Do not write unit in answer. Type your answer...Calculate the amount of heat needed to boil 39.6 g of hexane (C,H4), beginning from a temperature of 47.6 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. ?A 489.9 gram sample of aluminum is initially at 25.7 "C. It absorbs 38.27 kJ of heat from its surroundings. What is its final temperature, in "C? (specific heat 0.9930 J g1 °C' for aluminum) Do not put units in your answer. Do report your answer with correct significant figures.
- ( Try Again Your answer is incorrect. • Row 1: Your answer is incorrect. • Row 2: Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations. • Row 3: Your answer is incorrect. A student dissolves 14.2 g of ammonium chloride (NH4C1) in 200. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 23.0 °C to 18.9 °C over the course of 8.2 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NH4C1(s) NH,(aq) + CI (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this…Calculate the amount of heat needed to boil 189. g of water (H₂O), beginning from a temperature of 52.0 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 x10 X 380.2 grams of a metal that is at temperature 95.15 °C is placed in 257.0 mL of water at 19.06 °C. The temperature of the water rose to 25.70 °C. Density of water is 1.00 g/mL. c of water is 4.184 J/g°C. What is the specific heat, c, of the metal in J/g°C. ? Put answer in box with 3 digit past decimal in regular non scientific notation
- Calculate the amount of heat needed to boil 145. g of methanol (CH,OH), beginning from a temperature of 17.4 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. ?Acetylene C2H2 gas is often used in welding torches because of the very high heat produced when it reacts with oxygen O2 gas, producing carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 1.00mol of water. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.If 140.56 grams of water is to be heated from 27.85°C to 100°C to make a cup of tea, how much heat must be added? The specific heat of water is 4.184 J/g°C Answer should be in kJ