4. If the Law of Conservation of Energy states that energy is neither be created nor destroyed, but can only be transferred or changed from one form to another, why do scientists worry about running out of energy in the future?

Q: Distinguish between heat and temperature, using examples to clarify your definitions.

A: Temperature is used to describe the average kinetic energy of a molecule. Heat transferred from hot…

Q: How much heat is required to warm 1.50 L of water from 25.0 °C to 100.0 °C? (Assume a density of 1.0…

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Q: The study of energy changes that accompany chemical and physical changes is known as? Select one: a.…

A: It is not definition of physical chemistry because it is interactions and transformations of…

Q: A gram of gasoline produces 45.0 kJ of energy when burned. Gasoline has a density of 0.77 g/mL. How…

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Q: why do scientists worry about running out of energy in the future?

A: The demand of energy is increasing day by day because of increasing population. This growth is…

Q: 8. Based on the observations above, does a chemical reaction take place When you MIx thnese…

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Q: In metric terms, a typical automobile averages 5.72 km/L of gasoline burned. Gasoline has a heat of…

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Q: The heat equation, as given in the introduction, can also be rearranged to calculate the mass or…

A: The specific heat required to raise the temperature of a substance is given as:

Q: 123. In a grammatically correct sentence or two (and in your own words), describe what heat and…

A: Heat and temperature, both are very important thermodynamic quantities. They both are quiet…

Q: Mass of hot water  89 g Mass of cold water  90 g T hot water  70 °C T cold water  27 °C T mixture…

A: Answer:- This question is answered by using the simple concept of calorimetry which states that heat…

Q: O=C=0 carbon dioxide maldehyde methane

A: Potentail energy high means less stable or vice versa Formic acid is highest stanble compound due to…

Q: For this experiment, 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are allowed to…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 355.0 g sample…

A: A numerical problem based on chemical thermodynamics, which is to be accomplished.

Q: A 1709 kg1709 kg car is traveling down the road at 87.0 km/h.87.0 km/h. While traveling at this rate…

A: Given that,

Q: 5. 5. If 20,000 J of energy are used to heat mercury by 4.00 °C, what is the mass of mercury? 6.…

A: Heat released or absorbed by a substance is calculated as: q = m.C.∆T where m is the mass of the…

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: What happens when Ethanol burns and what happens after it burns? What happens to the matter in…

A: Ethanol is a chemical substance made up of carbon, hydrogen and oxygen atoms. The chemical formula…

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

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Q: Two solid objects, A and B, are both at room temperature and then placed in boiling water. The…

A: Heat capacity - it is the amount of heat required to change the temperature by 1 Degree.

Q: Two solid objects, A and B, are both at room temperature and then placed in boiling water. The…

A: Heat capacity is the amount of energy in the form of heat,  takes for increasing the temperature of…

Q: Chemical changes are caused by an input in energy. In physical changes, there is no transfer of…

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Q: s0000 600 700

A: If we increase the kinetic energy of water molecules (usually done by heating them) then the…

Q: How much heat energy in joules is gained by water with a mass of 491 g, and a temperature change of…

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Q: A chemist placed a 1.195 g sample of fuel in a bomb calorimeter which was immersed into 2.00 L of…

A: The mass of the fuel sample is = 1.195 g The increase in the temperature of the water is = 20.1oC to…

Q: In metric terms, a typical automobile averages 5.76 km/L of gasoline burned. Gasoline has a heat of…

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Q: What temperature change will result if 200.0 grams of water absorb 800.0 Joules of heat ?

A: 200 grams of water absorb 800 joules of heat.Mass m = 200 gHeat q = 800 JWe need to calculate the…

Q: How much heat energy is lost when a 15.00 gram sample of water cools from 42°C to a final…

A: Specific heat capacity is defined as the heat  required to raise the temperature of one gram of a…

Q: 35. What quantity of heat is required to raise the temperature of 55.5 g of gold from 20 °C to 45…

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

Q: 1. For substances that will be in thermal contact, how would we know which will absorb energy…

A: #1: When two substances are in thermal contact with each other, heat is transferred in the form of…

Q: Consider the example of the block released from the spring and then travelling up the circular ramp.…

A: Nonconservative forces are the force of friction or the air resistance force. These forces takes…

Q: What is the SI unit of energy? List some other common units of energy.

A: The capacity to do work is called energy.

Q: 4) You are told that a chemical reaction is exothermic. How could you test whether the statement is…

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Q: A coal-burning power plant generates electrical power at a rate of 450 megawatts (MW), or 4.50 x 108…

A: Heat is that energy which is transferred from one body to another which creates difference in…

Q: A piece of unknown metal weighs 217 g. When the metal piece absorbs 1.43 kJ of heat, its temperature…

A: Given: Mass of metal, m = 217 g Heat energy, q = 1.43 kJ Initial temperature, T1 = 24.5oC Final…

Q: Digesting food is an example of what? A chemical change A physical change

A: Physical change :-  In this chemical composition of the substance does not change. Involve change in…

Q: If you wish to heat 4.0 L of water on the wood stove from 10.0 °C to 90.0 °C, how much heat must…

A: To solve this problem, we have to use formula which is- Q=m.c.dT Where m is the mass c= specific…

Q: In the laboratory a student finds that it takes 37.4 calories to increase the temperature of 14.3…

A: The amount of heat requires to increase the temperature of one gram of compound by 1° is called the…

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

A: Here, we need to calculate the value of specific heat of tin. Specific heat formula is used to…

Q: 2. Today we will try to answer the question "Can we model what is happening when particles are…

A: H2 gas is highly combustible in nature. And has high energy even then the gasoline. Now if we see…

Q: Consider the gasoline in your car's gas tank. What happens to the energy stored in the gasoline when…

A: Gasoline contains stored energy in the form of potential energy. When one drives a vehicle, one…

Q: A student is asked to identify an unknown piece of metal. The metal has a mass of 12.34 g. It is…

A: Given data,Mass of metal=12.34gTemperature of metal (Tm)=99.98oCVolume of water=103.25mLDensity of…

Q: The temperature of 34.7 g H2O changes from 27 °C to 53 °C. What is the heat associated with this…

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Q: Which statement is true of a chemical change? A. Heat is always exchanged between the system and…

A: Thermodynamics is the branch of chemistry in which we deals for the change in energy or heat, work…

Q: In a large building, oil is used in a steam boiler heating system. The combustion of 1.0-lblb of oil…

A: Given information, Combustion of 1.0 lb of oil produce = 2.4*107 J of heat And 1.0 lb = 0.454 kg…

Q: A geochemist in the field takes a small sample of the crystals of mineral compound X from a rock…

A: