Suppose a boil water notice is sent out advising all residents in the area to boil their water before drinking it or using it forcooking. You need to boil 10.5 L of water using your natural gas (primarily methane) stove. What volume of natural gas isneeded to boil the water if only 18.1% of the heat generated goes towards heating the water. Assume the density of methane is0.668 g/L, the density of water is 1.00 g/mL, and that the water has an initial temperature of 23.4 °C. Enthalpy of formationvalues can be found in this table. Assume that gaseous water is formed in the combustion of methane.volume of methane:L

Approach to solving the question: thermodynamics Detailed explanation: Key references: Atkins

Answered: Suppose a boil water notice is sent out…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A 21 gram piece of metal at 125 oC is dropped into 87 grams of water at 17 oC. The water temperature rose to 38 oC. Calculate the heat change of the metal in Joules. (DO NOT PUT UNITS IN YOUR ANSWER.) Assume that all of the heat lost by the metal is transferred to the water and no heat is lost to the surroundings. The specific heat of water is 4.184 J/g oC.
If 30.5 g of LiBr are dissolved 350.0 g of water at 20.0 °C in an insulated container, a temperature change is observed. The Δ H of solution of LiBr is -48.8 kJ/mol. Assuming that the specific heat of the solution is 4.184 J/(g C) and that no heat is gained or lost by the container, what will be the final temperature of the solution?
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6) A block of rhenium metal (specific heat =0.0329 cal/ gC) is heated to 88.2C and then dropped into 100.0 g of water initially at 26.4 C. The final temperature of the mixture is 32.4C. What was the mass of the block of rhenium?
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A chemist burned a sample of coal in a bomb calorimeter. Her results are below. Calorimeter's Heat Capacity 7.264 kJ/°C Mass of Coal Initial Temperature Final Temperature 0.100 g 22.07°C 25.37°C The sample of coal that the chemist placed in the bomb was dry but when she finished the test there was a small amount of water in the bomb. Where did this water come from and how does it affect her result? The water came from the water surrounding the bomb so her measured heat of combustion is for a closed system. The water was a product of combustion so her measured heat of combustion is for an open system. The water came from the water surrounding the bomb so her measured heat of combustion is for an open system. The water was a product of combustion so her measured heat of combustion is for a closed system.
A 4.81 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee cup calorimeter. Before placing the sample in the water, the temperature of the salt and water is 23.72°C. After the salt has completely dissolved, the temperature of the solution is 28.54°C. If 3.12 × 10³ J of heat was gained by the solution, what is the total heat for the dissolution reaction of the 4.81 g of salt? How many moles of the unknown salt were used in the reaction ? _______ J?
When substances are dissolved in water, they can absorb or release heat. Describe how you would use a calorimeter to determine the amount of heat required or released to when 10 grams of sugar is dissolved in 100 grams of water. Describe how you would calculate the heat absorbed or released by the sugar with the data you collect. (Do no perform any calculations.)
part 1 Which of the following describes what happens when we burn fossil fuels to produce energy? A decrease in the overall temperature of the planet. Fossil fuels release greenhouse gases into the air. Fossil fuels release water and air to the atmosphere. A marked rise in the overall temperature of the planet
3. A piece of metal with a mass of 97.6 grams was heated in a steam jacket to 94°C and then plunged into 243.6 grams of water at 21 °C, causing the temperature to rise to 24°C. What is the specific heat of metal? 4. How many cubic feet are there in a room measuring 6m x 10m x 3m?
CH4 (g) + 2 O2 (g) --> CO2 (g) + 2H2O (g) Δ H = -882 kJ/mol Using the equation above, how many grams of water will form if 655 kJ of energy was released.

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