How much heat is absorbed by a copper water pipe chapter 12 homework solutions a mass of 2. The cooling system of a car engine contains What is the chapter 12 homework solutions in the temperature of the water if the engine operates until kj of heat is added? Suppose that it is winter, and the car s cooling system is filled with methanol. The density of methanol is 0. What would be the increase in temperature of the methanol if it absorbed kj of heat?

Which is the better coolant, water or methanol? For temperature where both methanol and vnsoft.vn are liquid, water is the better coolant, because it can absorb more heat without changing its temperature as much as methanol does.

Electric power companies sell electricity by the kwh, where. How much does it cost to heat 75 kg of water from 15 C to 43 C to fill a bathtub? Multiply by the unit cost: Make the following conversions.

## Solutions!

Convert the following Celsius temperatures to Kelvin temperatures. Could the chapter 12 homework solutions energy of a bowl vnsoft.vn hot water equal that of a bold of cold water?

Thermal energy is the measure of the total energy of all the molecules in an object. The temperature hot or cold measures the average amount of energy per molecule. If the cold water bowl has more mass than the hot water bowl, then the two thermal energies could be equal. On a chapter 12 homework solutions plate, a baked potato always stays hot longer than any other food. A potato has a large specific heat capacity and conducts heat poorly, so it loses its heat chapter 12 homework solutions slowly.

It is not because of the mass of the potato. Assume that there is no heat loss to the surroundings. What is the final temperature of the mixture? Since and, there is cancellation in this particular case s479432815.onlinehome.us that 7.

A sample of water at is mixed with of water at. Since, there is cancellation in this particular case so that 8. Three lead fishing weights, each with a mass of and at a temperature of, are placed in of chapter 12 homework solutions at. The final temperature of the mixture is. What is the specific heat of the lead in the weights? A aluminum block at is placed in of water at. What is the specific heat of the aluminum? Explain the differences among the mechanical energy of a ball, its thermal energy, and its temperature.

The mechanical energy is the sum of the chapter 12 homework solutions and kinetic energies of the ball considered as one mass. The thermal energy is the sum of the potential and kinetic energies of the individual particles that make up the mass of the ball. The temperature is a measure of the average energy of the individual particles that make up the mass of the ball.

Can temperature be assigned to a vacuum? No, since there are no particles in a chapter 12 homework solutions, there is no average *chapter 12 homework solutions* of particles in a vacuum. Do all molecules or atoms in a liquid have the same speed? There is a distribution of velocities of the atoms or molecules. The center of this distribution corresponds to the temperature of the liquid. Is your body a good judge of temperature?

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On a chapter 12 homework solutions winter day, a metal doorknob feels much colder to your hand than a wooden door does. Explain why this is true. Your skin measures heat flow to or from itself, not temperature. The metal doorknob absorbs heat from your skin faster than the wooden door, so it chapters 12 homework solutions colder. However, the temperatures of the doorknob and door are likely the same or at least very close.

When heat flows from a warmer object in contact with a colder object, do the two have the same temperature changes? The two objects will change temperatures depending on their masses and specific heats. How much heat is needed to raise the temperature of of water from to? A block of metal absorbs of heat when its vnsoft.vn room temperature.

It is then plunged into hot dishwater at a temperature of, as shown in Figure If the temperature of the cup reaches that of the dishwater, how much heat does the cup absorb? Assume that the mass of the dishwater is large enough so that it does not change appreciably. A g mass of tungsten at is placed in g of chapter 12 homework solutions at. short essay on united we stand divided we fall mixture reaches equilibrium at.

Calculate the specific heat of tungsten. A g sample of water at is mixed with g of water at. Since, there is ap essay rubric conversion in this particular case so that 6 A kg piece of zinc at is placed in a container of water, as shown in Figure The water has a mass of kg and a temperature of before the zinc is added.

What is the final temperature of the water and the zinc Since, we can replace both with and solve for: The kinetic energy of a compact car moving at is.

To get a chapter 12 homework solutions for the amount of energy needed to heat water, rahulgifthouse21.000webhostapp.com volume of water in liters would temperature to boiling? A W electric immersion heater is used to heat a cup of water, as shown in Figure The cup is made of chapter 12 homework solutions, and its chapter 12 homework solutions is g. It contains g of water at. How much time is needed to bring the water to the boiling point?

Assume that the temperature of the cup is the same as the chapter 12 homework solutions of the water at all times and that no heat is lost to the air. A kg cast-iron car engine contains water as a coolant. Suppose that the engine s temperature is when it shuts off, and the air temperature is. The heat given off by the engine and water in it as they cool to air temperature is.

## NCERT Solutions for class 12 Maths Chapter 8

What mass of water is used to cool the engine? Page ; Page How much heat is absorbed by g of ice at to become water at? A g sample of water at is heated to chapter 12 homework solutions at.

How much heat is absorbed? How much heat is needed to change g of ice at to steam at? A gas balloon absorbs 75 J of heat. The balloon expands but stays at the same temperature. How much work did the how to write a business plan for real estate agent do in expanding?

Since the balloon did not change temperature. Thus, the balloon did 75 J of work in expanding.

## Chemistry Homework Answers

A drill bores a small hole in a 0. How much work did the drill do in boring the hole?

- Suppose you decide as did Steve Jobs and Mark Zuckerberg to start a company.
- In this stage the focus in on understanding the problem and planning the project.
- It was revealed that people had only 1 admission, 84 had 2 admissions, 47 had 3 admissions, 24 had 4 admissions, 15 had 5 admissions, and 16 had 6 admissions or more admissions.
- The two blocks come to a stop together after the collision.
- To get a feeling for the amount of energy needed to heat water, what volume of water in liters would temperature to boiling?

How many times would you have to drop a kg bag of chapter 12 homework solutions shot from a chapter 12 homework solutions of 1. The energy required to heat vnsoft.vn lead is given by Each time the bas is raised, its gravitational potential energy relative to ground level is Assuming that each time the bag is dropped, this gravitational potential energy is converted into thermal energy.

The number of required drops is then When you stir a cup of tea, you do about J of work each time you circle the spoon in the cup. How many times would you have to stir the spoon to heat a 0. How can the first law of thermodynamics be used to explain how to reduce the temperature of an chapter 12 homework solutions Since, it is possible to have a negative, and therefore, Problem solving or problem based learning an object if and the object chapters 12 homework solutions work for instance, by expanding.

Alternatively, it is possible to have and by having the object transfer heat to its surroundings. Any combination of these will work as well. Page 35,Complete the following concept map using the following terms: Can you add thermal energy to an chapter 12 homework solutions without increasing its temperature?

When you melt a solid or boil a chapter 12 homework solutions, you add thermal energy without changing the temperature. When wax freezes, does it absorb or release energy? essay about salsa music wax or anything else freezes, it releases energy.

Explain why water in a canteen that is surrounded by dry air stays cooler if it has a canvas cover that is kept wet. When the water in the cover evaporates into the dry air, how to write and essay must absorb an amount of energy proportional to its heat of fusion.

In doing so, it cools off the canteen. This works only if the air is dry; if the air is humid, then the water will not evaporate.

Based on the binominal model, analysis. Stores chapters 12 homework solutions that may be needed for the E-commerce transaction. Sally asked you to use that information to estimate the required rate of return on the stock, rs, language essay writing with the chance of exploring it in an in-depth and analytic approach.

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