Consider the gasoline in your car's gas tank. What happens to the energy stored in the gasoline when you drive your car? Although the total energy in the universe remains constant, can the energy stored in the gasoline be reused once it is dispersed to the environment?

Q: A piece of unknown metal has a mass of 217 g. The metal absorbs 1.43 KJ of heat, its temperature…

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Q: The specific heat of lead is 0.129 J/g C°. How many joules of heat are required to raise the…

A: Specific heat capacity of lead: 0.129J/g°CTinitial = 22°CTfinal = 37°Cmass of lead = 380g

Q: closed system includes a cup of warm water and an ice cube that was just placed inside of it. Which…

A: Here closed system means it is assumed that the system is isolated from surrounding i.e. mass and…

Q: A calorimeter is pictured below. When substances are dissolved in water, they can absorb or release…

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Q: A  55.2 g piece of metal has a temperature of 90.4 °C before being placed into 102.5 g of water at…

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Q: Benzene  is burned in oxygen. Write the balanced chemical question. Calculate the change in heat of…

A: Given ,Benzene is burned in oxygen.Objective :Write the balanced chemical equation.Calculate heat of…

Q: A student places a block of hot metal into a coffee cup calorimeter containing 162.2 g of water. The…

A: 162.2 g of water.T1 = 21.3 oCT2 = 37.6 oC

Q: Dina is observing a sample of copper metal after it was removed from a flame. She noticed that the…

A: The answer for this problem is provided below in great details within the attached figure.

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 165.0 g sample…

A: We have been given initial temperature, final temperature, mass of sample and heat required to raise…

Q: Although matter is conserved during chemical reactions, does all the reactions get converted into…

A: By understanding the factors that affect the extent of reaction, it is possible to design reactions…

Q: When a chemical reaction or a phase change occurs and energy is released to the surroundings then…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: 2. A system performs 3.63 kJ of work and gives off 8.98 kJ of heat. What is the change in energy of…

A: To solve this problem we will use First Law of Thermodynamics  .  According to this law  ∆E = q + w…

Q: A student places a block of hot metal into a coffee cup calorimeter containing 168.5 g of water. The…

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Q: 21. A turblne system Is used to produce electrical energy. Wires (electrical energy) Turbine…

A: As per conventions, maximum energy is present at the source. As we convert the energy at the source…

Q: An exothermic reaction is one where none of these heat is transferred from a system into the…

A: we have to select the correct statement for an exothermic reaction

Q: 3. State whether the following processes are exothermic or endothermic. a. Ice melting b.…

A: 13.Exothermic process is a process in which heat energy is produced and endothermic process is a…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.79 kg sample…

A: We have been given Heat needed, q = 1.6KJ = 1.6 × 103J Mass of substance, m = 0.79Kg…

Q: A scientist wants to perform a reaction in a vacuum chamber to control the experiment as much as…

A: Since experiment is performed in the vacuum it means their exist no medium and he wants to determine…

Q: Knowing that liquid water has a much higher specific heat capacity than the metal lead, which sample…

A: Q = m . s . ∆T Where, Q = heat absorbed; m = mass of substance; s specific heat capacity and ∆T =…

Q: 19. An ice cube is placed in a sealed insulated container of hot water at 80°C. After five minutes,…

A: According to law of mixture    Heat rejected by hot water is equal to heat gained by ice cube.

Q: 4. Given the balanced equation representing a reaction: 2 Na(s) + Cl, (g) – 2 NaCI(s) + energy If 46…

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Q: Ignition wires heat Thermometer A bomb calorimeter, or constant volume calorimeter, is a device…

A: Given: mass of 1,6-hexanediol = 0.520 g mass of water = 1090 g Initial temperature = 24.30 oC Final…

Q: What is the difference between endothermic and exothermic reactions? Endothermic reactions absorb…

A: For an endothermic reaction, the energy of the products is greater than the energy of the reactants.…

Q: In the laboratory a student finds that it takes 62.4 calories to increase the temperature of 15.0…

A: Given :-  Heat absorbed = 62.4 cal  Mass of Mg = 15.0 g  Initial temperature = 20.9 oC  final…

Q: If you have ever been to the beach you will find that the sand heats up and cools down faster than…

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Q: heat, upon which the temperature of the sample increases from 21.5 °

A: Dear student I have given answer to your question in the image format.

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.33 kg sample…

A: Given data : Mass of C6H4F2 = 0.33 kg = 330 g (1 kg = 1000 g) The molar mass of the compound =…

Q: A 2.85 g sample of a food substance was burned in a calorimeter that had a heat capacity of 9.84…

A: Given: The mass of the food substance burned = 2.85 g The heat capacity of the calorimeter = 9.84…

Q: What do you think would happen if energy were not conserved? Think of (and share) two scenarios in…

A: Since you have posted a question with multiple questions, we will solve first question for you. To…

Q: A hot 105.9 g lump of an unknown substance initially at 154.0 °C is placed in 35.0 mL of water…

A: The objective of the question is to identify the unknown substance by using the principle of…