Heat energy Definition and 89 Threads

I have been doing some research on ozone recently, and I have a question that none of my resources have answered... The following reaction is an exothermic reaction, but how would I calculate the amount of heat energy is released? O_{3} \underbrace{\rightarrow}_{uv\ light} O_{2} + O...

1. Homework Statement Calculate the heat energy required to convert 0.10 kg of ice at -10 degrees Celcius into steam at 100 degrees Celcius. 2. Homework Equations E = m c dt (1) where E = heat energy (kJ) m = unit mass (kg) c = specific...

Homework Statement There is a process that has three phases: isochoric, isobaric and isothermic. How to calculate the transfer of energy as heat(Q) during the isotherm and isobaric process? The temperature and the mass of the gas is known. Homework Equations In isochoric...

Calculating Heat Energy (HELP) Homework Statement A mixture consisting of 1.00g oxygen gas and 1.00g neon gas is trapped within a 1.0L container at an initial temperature of 298K. Calculate the heat energy required to increase the temperature of this mixture to 398K (a) at a constant volume...

Homework Statement Heat Q flows into a monatomic ideal gas, and the volume increases while the pressure is kept constant. What fraction of the heat energy is used to do the expansion work of the gas? Homework Equations ΔU = Q - W Q = nC_pΔT W = PΔV C_p = C_v + R => C_p = 3R/2 + R => C_p =...

Largest Unit of Heat Energy? Which of the following is the largest unit of heat energy: (a) calorie, (b) Btu, (c) joule, or (d) kilojoule. I narrowed it down to kilojoule or btu. I think it is btu.

Homework Statement Why is heat energy unusable? Homework Equations Heat = total kinetic energy of an object The Attempt at a Solution I've come across this statement so many times - whether it be in Physics, Environmental Science, Chemistry, or Biology - "thermal energy (heat) is...

When thinking about how everyday engines could be made to be more efficient . I remembered a biology lecture, where I was taught that the blood in the gills of a fish, move in the opposite direction of water flow when they swim, allowing them to absorb a higher level of oxygen from the water...

Homework Statement A force of 120N pushes a crate of mass 15 kg along the ground at a constant speed of 3.2 m/s for a distance of 6.2m. What amount of heat energy was generated during this time? Homework Equations W = Fd KE + PE = KE ' + PE ' The Attempt at a Solution I don't...

Homework Statement How much energy must be removed from a 4.50 cm x 4.30cm x 6.20cm block of ice to cool it from 0C to -31.0C? The density of ice is 920 kg/m^3. You might need to refer to the textbook for other physical constants of ice.Homework Equations Q = Mc(T_f-T_i) heat energy =...

Is it possible to convert sound energy into heat energy (or any other type of energy) so that a loud sound will be almost silenced?

why does your hand not feel the radiant heat energy from a fireplace if you place it behind a sheet of glass, even though you can see the fire very easily?

Question: Using a Joule's calorimeter to investigate the efficiency of the conversion of electrical energy to heat energy. Equipment: Joule's calorimeter balance thermometer (0-100degrees celsius) power supply (0-12V) ammeter (0-5A) rheostat stopwatch electrical leads and distilled...

Where does most of the heat energy in fission reactions come from? -Does it come from radiation emitted from particles leaving the nucleus? -Does it come from those actual particles leaving the nucleus and hitting surrounding gases in the air, causing them to move and heat up? -Something...

how do you do heat energy questions? is it the energy lost? An unpowered 1600 kg object has an upward velocity of 7.0 x 10^3 m s at an altitude of 100 km above the earth. The object reaches a maximum altitude of 400 km. Earth 100 km 400 km v = 7.0 × 10^3 m s What is the heat energy...

Hi, wonder somone could help me, I am not physics expert. If a lube oil has a specific heat of 0.444Btu/Lb.F, how do I calculate the heat energy (kw) required to raise its temperature from 10C to 40C. Amount of liquid is 35L. Will I be able to calculate the time it takes to raise the temperature...

If I have amount of hydrogen and Oxygen combined together after a reaction it will produce water and heat. How can I measure the temperature of this heat energy? Now.I have 1) heat capacity (Cth) of H2 and O2. 2) the mass (m) of H2 and O2 combined together (in moles and grams) 3) Heat...

Homework Statement One mole of a monatomic ideal gas, initially at temperature T, undergoes a process in which its temperature is quadrupled and its volume is halved. Draw a PV diagram of this process. Then find the amount of heat Q transferred to the gas. It is known that in this process...

They say that incandescent bulbs waste a lot of energy in the form of heat, while cfl's do not. I want to understand why this is so. They both produce white light? Is it a difference in the radiated spectrums of each type of bulb, or does it have to do with the mechanics of making light by...

Hi all, Can Anyone tell me What is actually happening when we placed an Electrical rod in a Bucket Of Water? No Doubt after some time water will heat. But how? I mean to say How Electrical Energy Converted To Heat Energy?

ok all i can find on google is Heat to Electrical so i thought id ask here. how exactly do i explain how electrical energy is converted to heat energy? right now I have this: As the voltage travels through the coil wire, the wire gives off heat. it doesn't feel like enough. "the...

heat energy out of 500 w halogen bulb? how much heat energy is liberated out of a 500W halogen bulb??>? what temp is reached in 1 min.

Homework Statement the problem is one of understanding. if heat is incident on a surface raising the temperature to some number then conducts through the solid to the other side how much heat energy is actually at the other side?? i understand the temperatures will be different and that heat...

Homework Statement Much of the energy of falling water in a waterfall is converted into heat. If all the mechanical energy is converted into heat that stays in the water, how much of a rise in temperature occurs in a 100 m waterfall? Homework Equations q=mc(Tf-Ti) Q=mc Delta T Delta...

Homework Statement If a box is pushed along a level surface, what could be said if the coefficient of fricion(\mu) increases? a) Final kinetic energy increases and heat energy increases b) Final kinetic energy increases and heat energy decreases c) Final kinetic energy decrease and heat...

So if heat energy is transferred at a constant rate until the water reaches its boiling point temperature (in 6 min let's say)... and then heat energy is transferrred at the same rate as the water boils for the next 4 min... would the graph of time v. temperature look like: a straight line...

1.) An iceberg's volume is 2*10^6 m^3. If the temperature of the iceberg is is 250 K and the density is .9998 g/cm^3, how much heat energy would be required to competely melt it? 2.) An object weighs 500 grams and has a specific heat of 2 Joules/g C. The object absorbs 40% of the output of...

solar energy heat energy light energy... i am a student in high school. and i want to ask someone about the basics of solar energy. i want to create a solar system that can heat up water. anyof you can give some advices/ equation/model/ for my idea. is ther possible if a solar cells can run...

Is it possbile to covert heat energy (like that from the surface of a hot radiator) to electric energy? Whats the theory behind this? --thank you.

100 mL of water at 288 K is placed in the freezer compartment of a refrigerator with a coefficient of performance of 4.0. How much heat energy is exhausted into the room as the water is changed to ice at 258 K? (The answer is 5.34 x 10^4 J) I tried using the Brayton-cycle refrigerator to...

0.250 mol of a monatomic gas follows the process shown in the figure. How much heat energy is transferred to or from the gas during process 1 to 2? How much heat energy is transferred to or from the gas during process 2 to 3? What is the total change in thermal energy of the gas? I am not...

Calculating heat energy... Q. #1 A 16 kg object is dropped from a height of 25 m and strikes the ground with a speed of 18 m/s. How much heat energy was produced during the fall? Choices A) 0 J B) 2 600 J C) 1 300 J D) 3 900 J Well,according to my calculation, the average...

Explain how it is possible for 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water a 100 deg C. ( Assume a pressure of one atomsphere).

Explain how it is possible for a 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water at 100 deg C. (Assume a pressure of one atmosphere.)

how can 30,000 kg of snow at 0 C have more heat energy than 1 mL of water at 100 C?

My physics class is doing a project where we need to calculate the airconditioning requirements for our class room. I need to find out the amount of heat energy given off by a person sitting at a desk, wearing shorts and tshirt. I have found some sites that state 100watts to 150watts Is...

Are there any endothermic reactions that can release the converted heat energy as electricty? How do they work? I wonder if it is possible to create something that will convert heat to electricty all the way down to refridgerator temps... they you got your personal power generator and a...

can the water (100 oC) gain latent heat energy from the same temperature object?

All the basic physics books I've read explain heat as particles in motion. This means a hot chunk of matter is simply one which has its particles bouncing around more rapidly than a cooler chunk. I accepted this description for awhile. However, since I started to think about it more, It would...