How many grams of oxygen gas must burn to emit -279 kJ of heat? CH4 + 202 --> CO + 2H20 AH = -802 kJ/mol OR C H4 + 2 02 right arrow CÓ + 2H2 O Delta H = -802 kJ/mol Do not type units with your answer. Type your answer to three significant figures. If this question is on an exam on your scrap paper report your answer to the proper number of significant figures but still type three significant figures online. Your Answer:

Q: In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used…

A: Mass of Zn = 66.79 g

Q: use the photo attached please to answer the questions  1. This reaction is... 2.Suppose 56.0g of…

A: If the heat is released reaction is exothermic  and if the heat is being absorbed the reaction is…

Q: A 29.8 g sample of water at 4.7 "C is mixed with 52.5 g of water at 74.8 "C. Calculate the final…

A: we need to calculate the final temperature of the mixture

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

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Q: A 30.22 gram sample of copper (specific heat, 0.385 J/g•°C) with an initial temperature of 107.3°C…

A: Final Temperature of the metal isTf = 31.6 oC

Q: Use the References to access important values if needed for this question. In the laboratory a…

A: Given Mass = 13.9 g Temperature difference = 40-24.3 = 15.7°C Heat (Q)  = 28.2 J

Q: heat in kJ

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Q: When 151.0 mL of water at 26.0 C is mixed with 71.0 mL of water at 85.0 C, what is the final…

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Q: A 20.8 g piece of metal has a specific heat of 0.52 J/g°C. It was heated to 9.5°C then placed inside…

A: Formula used :  -q(lost) = q(gained) If no heat is lost to the surrounding.

Q: You heat 20.1 g of a solid in a test tube to 100.00°C and add it to 50.00 g of water in a coffee-cup…

A: Since the water and solid are in contact ,heat is transferred from the solid to water until they…

Q: A 1.08 kg sample of an unknown substance was heated up using 8,500 cal of energy from 46.0 °C to…

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Q: 97. How much heat in kilojoules is required to heat 56 L of water from an initial temperature of 85…

A: Volume of water, V = 56 L or 56000 mL Density of water, ρ = 1 g/mL Determine the mass of water, m –…

Q: A 1.37 kg sample of an unknown substance was heated up using 8,011 cal of energy from 45.1 °C to…

A: We are given the sample of unknown  species  mass=1.37 kg=1370 gm Energy Q=8011 cal 1 cal =4.184…

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

A: The question is based on the concept of calorimetry. We have to determine specific heat capacity of…

Q: As a professional nerd I prefer to heat my coffee using a Bunsen burner.  Bunsen burners use methane…

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Q: Q3) Consider the following thermochemical equation: 2NO + OzR) 2 ΝΟω AH = -114.1 kJ If 3.00 x 102 g…

A: Nitrogen monoxide reacts with oxygen to form nitrogen dioxide. The thermochemical equation for this…

Q: A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat…

A: Given, Mass of quinizarin - 0.6677 g. Temperature change(dT) - 26.86 oC to 29.43 oC =  Mass of water…

Q: repair crews to weld rails together. -) Ⓡ 2Fe(s) + Al2O3(s) DH rxn= -850 kJ -n, in grams, is formed…

A: Exothermic process is the one in which energy is liberated from the system to the surrounding in the…

Q: A 74.0-gram piece of metal at 94.0 °C is placed in 120.0 g of water in a calorimeter at 26.5 °C. The…

A: In the given question we have to calculate the specific heat of metal and to explain the law of…

Q: A block of copper is heated to 392 °C and then is dropped into a coffee cup calorimeter containing…

A: Heat gained by water = Heat lost by block of copper Therefore,  qwater = -qcopper   Heat gained by…

Q: A 50.0 g sample of water at 70.0 °C is mixed with 60.0 g of water at 20.0 °C. Find the final…

A: Given: 50.0 g sample of water at 70.0 °C  60.0 g of water at 20.0 °C no heat is transferred to or…

Q: How many joules of heat are required to heat 125 g aluminum from 19.0°C to 95.5°C?

A: Specific heat: It is defined as the heat required the raise the temperature of 1g of a substance by…

Q: heat in kJ

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Q: 5. If you hold snow, the snow begins to melt and your hand feel cold. This is because melting snow…

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Q: Find the final temperature of water given an initial temperature of 28 ˚ C, a mass of 8 g, heat (q)…

A: Initial temperature of water (T1) = 28°C Mass of water (m) = 8 g Heat absorbed (q) = 184 J Specific…

Q: A 312 g sample of a metal is heated to 281.562 °C and plunged into 200 g of water at a temperature…

A: Here we can calculate the heat gained by water using its specific heat , mass and temperature…

Q: predict the final temperature of an object (in celsius) if the object is 236.36 g, has a specific…

A: q= cm∆T q= heat lost  m is mass of substance ∆T is change in temperature.

Q: Cup + Water (g) 103.4g Cup 1.6g Water ? Initial Temp 19.8°C Final Temp 27.6°C Change in Temp For the…

A: We have given that  Cup + water = 103.4g  Cup = 1.6g  Water  = (Cup+ water) - ( Cup)              =…

Q: auiloses iQ yQn 9. How many joules of heat is required to heat a 34.0 g copper bowl from 20.0 °C to…

A: It is required to calculate the joules of heat required to raise the temperature of 34 g copper bowl…

Q: A coffee-cup calorimeter contains 70 mL of water with an initial temperature of 24.9°C. An unknown…

A: The heat absorbed (q) by the water can be obtained by the multiplication of mass (m) of water with…

Q: 7. If you add a 120 °C platinum piece with a mass of 2.34 g (c = 0.126 J/g°C) to 100 g of 5.2 °C…

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Q: ded för this question. In the laboratory a "coffee cup" calorimeter, or constant pressure…

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Q: Which one of the following is an endothermic process? A Hydrochloric acid and barium hydroxide are…

A: The energy difference of the products and reactants is known as the energy change of a reaction.

Q: If 0.067 mol of hydrochloric acid  (HCl)  is mixed with 0.067 mol of sodium hydroxide  (NaOH)  in a…

A:

Q: 6.139 Hydrogen is burned in oxygen to release heat (see equation below). How many grams of hydrogen…

A: To solve this problem first we have to calculate the amount of energy required and then tha mass of…

Q: piece of metal was placed into a 75.00 grams of water. the temperature of the water increased from…

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Q: How much heat must be absorbed by a 13.0 g sample of water to raise its temperature from 13.0°C to…

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Q: A 20.94 g sample of a metal is heated to 99.4°C in a hot water bath until thermal equilibrium is…

A: The heat lost by the metal is determined as follows,

Q: 14.0 g of metal at 24.0 °C has 250 joules of heat added to it. The metal's specific heat is 0.105…

A: We have given that  14.0 g of metal at 24.0 °C has 250 joules of heat added to it. The metal's…

Q: A student heats a 5.0 g sample of an unknown metal to a temperature of 207∘C, and then drops the…

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Q: An 80.0 g sample of metal, initially at 96.0°C, is placed into 150. g of water initially at 26.0°C…

A: The unknown metal is initially at a higher temperature, so it will lose heat on being dropped into…

Q: A piece of iron (specific heat, 0.444 J/g•°C) is added to 127.31 grams of water (specific heat,…

A:

Q: In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used…

A:

Q: You heat 26.1 g of a solid in a test tube to 100.00°C and add it to 50.00 g of water in a coffee-cup…

A:

Q: An 80.0g sample of metal, initially at 96 degrees C, is placed into 150g of water initially at 26…

A:

Q: How many grams of ethanol (C2H5OH) is needed to provide/release 699.0 kJ of heat? C2H5OH(l) + 3O2(g)…

A: The given reaction is,

Q: Propane (C3H8) is often used to heat homes. The combustion of propane follows the following…

A: Answer: 172.64 grams

Q: 40. Gloves are often worn to protect the hands from being burned when they come in contact with very…

A: Given data set: Mass of glove = 86.2 grams Increase in temperature= 25.9 F = 14.36 C Heat absorbed=…

Q: How much heat is given off to the surroundings when 6 g of aluminum reacts according to the…

A: Thermodynamics is the branch of chemistry that mainly deals with the heat transfer between system…