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July 22, 2014

Search: How much heat is required to warm 1.60 kg of sand from 20.0^\circ C to 100.0 ^\circ {\rm C}?

Number of results: 32,994

Chemistry
Liquid Butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 39.3g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.
January 31, 2008 by Lauren

physical science
Lead is a soft, dense metal with a specific heat of 0.028 kcal/kgC, a melting point of 328.0C, and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a 202.2 kg sample of lead with a temperature of 20.0C?
October 12, 2010 by Anonymous

Physical Science
lead has specific heat of .028kcal/kgC, melting point of 328 degrees C and a heat fusion of 5.5 kcal/kg. how much heat must be provided to melt a 250kg sample of lead with a temperature of 20 degrees Celsius?
April 8, 2011 by yolanda

Science
Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this heat come from? A) Special metabolic pathways exist just for the production of heat. B) Mitochondria produce heat in the form of ATP. C) Plants store up heat as they perform...
October 26, 2011 by Jason

chemistry
what quantity of heat is required to vaporize 141 g of benzene at its boiling point 80.1 degrees celcius? heat of vaporization is 30.8 degrees celcius.
January 20, 2011 by Angela

Physics
Why are igloos made of ice, aren't they supposed to keep warm? Igloos are supposed to protect from the outside temperature and wind. I will be happy to critique your thinking. Igloos are made of ice in regions where no other building materials are available. They are much ...
April 22, 2007 by Kranji Secondary School

Chemistry
A quantity of ice at 0.0 degrees C was added to 33.6 of water at 21.0 degree C to give water at 0.0 degrees C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g * degrees C) q = mass x specific heat x delta T? q = mass x heat...
February 4, 2008 by Lauren

CHEMISTRY
How much heat is lost by 65g of silver when it cools from 325C to -25C? (the specific heat of Ag(s) is 0.24 J/g C)
December 16, 2011 by Cha-Ching

Chemistry
How much heat is required to convert 9 grams of water at 100 degrees C into steam at 100 degrees C. Hvap for water = 40.7 kJ/mol
December 14, 2010 by Hannah

Physical Science
The heat of volcanoes and hot springs comes from trace amounts of radioactive minerals found in the Earth's interior. Why isn't the same rock at the Earth's surface warm?
March 10, 2008 by Rachel

Science
How much heat energy is required to raise the temperature of 5Kilograms of a coal from 20 C to 220 C ? Coal? Doesnt coal decompose before 220C> 1,314,718 j is the correct answer to this question, I just finished a test with that same qustion on it.
July 31, 2005 by Janice

intro to chem
Calculate the amount of heat required to heat a 3.0kg gold bar from 23 degrees Celsius to 60 degrees Celsius
June 21, 2014 by Carol

Chem-E / Chemistry
Calculate the rate of heat required to bring 1.80mol/hr of HBr gas from 37.0 C to 434.0C at atmospheric pressure (Heat capacity of HBr is described by eq.) Cp (kJ/mol * C) = a + bT + cT^2 + dt^3 T is in C and HBr - a = 2.910x10^-2, b= -2.27x10^-7, c= 9.887x10^-9, and d= -4....
August 15, 2012 by Simon

general chem
How much heat is released whena mass of 125 g with a specific heat of 4.11 J/g C increases from 23.2 C to 34.9 C?
March 13, 2011 by Anonymous

Beginner Chemistry!
How much heat is lost by 65g of silver when it cools from 325C to -25C? (the specific heat of Ag(s) is 0.24 J/g C)
December 19, 2011 by Cha-Ching

Science
How much heat is necessary to heat 100 g of water at 10C to 95C?
October 12, 2012 by Anonymous

physics
A woman finds the front windshield of her car covered with ice at -12.6C. The ice has a thickness of 4.80 10-4 m, and the windshield has an area of 1.25 m2. The density of ice is 917 kg/m3. How much heat is required to melt the ice?
April 14, 2008 by Jaime

Physic II
a carnot heat engine operates between reservoirs at 550K and 300K, discarding 1500J of heat in each cycle. A) What is the engine's efficiency? B) How much heat is supplied to the engine by the hot reservoir in each cycle?
April 30, 2014 by rujiye

phisic
Treating air as an ideal gas of diatomic molecules, calculate how much heat is required to raise the temperature of the air in an 7.47 m by 14.9 m by 2.87 m room from 19.9C to 21.7C at 101 kPa. Neglect the change in the number of moles of air in the room
May 3, 2011 by please help me

Physical Science
Hello, Can some one tell me if I came to the correct answer... Thank You How much heat energy is required to raise the temperature of 5 kilograms of coal from 20 degrees celsius to 220 degrees celcius? my answer: 1,314,718 J
February 8, 2008 by Mandi

physical science
Compare the amount of heat required to change teh temperature of 150 kg of copper from 12 degrees celcius to 56 degrees celcius to the amount of heat required to change the temperature of 150 kg of gold from 12 degrees celcius to 56 degees celcius.
April 2, 2011 by Judy

chemistry
how much energy would be needed to warm 7.40 g of water by 55 degrees celcius
May 11, 2010 by lisa

AP Chemistry
Ammonia, NH3, is used as a refrigerant. At its boiling point of -33 degress Celcius, the enthalpy of vaporization of ammonia is 23.3 kJ/mol. How much heat is required to vaporize 355 g of ammonia at -33 degrees Celcius? a. 1.12 kJ b. 152 kJ c. 251 kJ d. 486 kJ e. 8.27 x 10^3 kJ
April 4, 2008 by Joe

Physics
Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2430 kJ/kg at body temperature, and the body can produce as much as 1.3 kg of sweat per hour. If sweating were the only heat dissipation mechanism, what would be ...
December 2, 2011 by Allie

Physics
A 10-kg piece of aluminum (which has a specific heat of 900 J/kgװC) is warmed so that its temperature increases by 5.0 C. How much heat was transferred into it?
December 19, 2010 by JJ

10th geade Chem
Does anyone know how much heat do I need to convert 95g. of ice at -25 C. to water at 30 C. the heat capacity of H2O(s) is 2.1 J/g*C.
February 28, 2011 by diana

physics
A 40-g block of ice is cooled to −71C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts, determine how much ...
April 6, 2012 by kevin

physics
A 40-g block of ice is cooled to −71C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts, determine how much ...
April 11, 2012 by anthony

Chemestry
How much heat (in kJ}) is required to vaporize it? (Assume a density of 1.00 g/mL ) I have this 60.0ML/ 1.00 g/ml = 60grams 60/153/81 g/mol = .3900916715 moles .3900916715 moles / 43.9 kj/mol = 17.122 And it keeps telling me the answer is wrong.
January 25, 2009 by Creative9k

Chemistry
1. How much heat is absorbed when 63.7g H(small 2)O [water](l) at 100 degrees C and 101.3 kPa is converted to steam at 100 degrees C? Express your answer in kJ. Is there an equation? 2.How much heat (in kJ) is released when 0.677 mol NaOH(s) is dissolved in water? (Steps?) ...
May 12, 2010 by Anonymous

English
Thank you very much. Here are some more sentences I'm not sure of. 1) Jason was very rude because he pushed Mickey. Mickey dropped the milkshake on the floor. Storm picked up the milkshake and poured it over Jason. The manager fired them both. 2)When I go to the supermarket, I...
February 1, 2011 by Franco

Chemistry please help
Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 255 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 J/(g/ K), as water over this temperature ...
November 3, 2008 by Saira

chemistry
Determine the specific heat of iron if 6.1 J of energy are needed to warm 1.50 g of iron from 20 degrees C to 29 degrees C
January 16, 2012 by Anonymous

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
June 27, 2011 by Lance

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
June 27, 2011 by Lance

Chemistry
How much heat is needed to melt a 25 gram ice-cube at 0 C? The molar heat of fusion for water is 6.01 kJ/mol. A) 6.01 kJ B) 8.35 kJ C) 150.25 kJ D) 3.34 kJ E) 9.22 kJ
March 12, 2010 by Natalie

College Chemistry
Calculate the heat in joules needed to warm 225g of water from 88.0 degrees Celsius to its boiling point 100.0 degrees Celsius
October 24, 2012 by Alex

Chemstry Help Drbob!
How much heat (in kJ}) is required to vaporize it? (Assume a density of 1.00 g/mL ) I have this 60.0ML/ 1.00 g/ml = 60grams 60/153/81 g/mol = .3900916715 moles .3900916715 moles / 43.9 kj/mol = 17.122 And it keeps telling me the answer is wrong.
January 25, 2009 by Creative9k

surface energy budget
I'm give the following data: Q*, QG, QH, QE for a 24-hour period, i'm required to plot these 4 data on the same graph, which I've already done. I'm also required to compute these 24 hours totals - transfer of sensible heat to the atmomsphere - transfer of latent heat to the ...
October 2, 2006 by Fai

Physics
How long would it take a kettle with a 1kW heating element to heat 1 litre of water? Watts = Joules / second Mass of 1 litre of water = 1kg 1 kW = 1 k Joule / second or 1000 joules/ second 1g of water needs 4.184J to raise the temperature by 1̊ c. Water ...
December 15, 2010 by Paul

Chemistry
The molar heat of vaporization of ethanol is 43.5 kJ/mo. Calculate the heat required to vaporize 25.0 g of ethanol at its boiling point. Ethanol is (2C 5H OH) Could someone please write the equation? (is the equation q=CmT)
May 18, 2010 by Anonymous

science
if it takes 31,500 joules of heat to warm 750g of water, what was the temperature change? My answer: Q = (M) (DeltaT) (c) Delta T=Q Delta T = 31,500J -------- 750gx 1.0cal/gCo Delta T = 42oC
April 26, 2008 by sam

Chemistry (check formula please)
how much energy (in kJ) is required to change the temp of 1.00 kg of Fe from 25.0 degrees celsius to 1515 degrees celsius? the specific heat capacity of iron is 0.449 J/g*K. this is the answer i got. q=(.449)(1.00)(1490)= 669.01 kJ
April 5, 2010 by Danielle

physics
How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W
January 23, 2012 by james

thermal energy
A hot 0.25-kg piece of iron is placed in a calorimeter containing room temperature water. How much heat is lost by the iron as it cools from 125 degree C to 75 degree C? I must have the given/work and answer also how much heat is gained by the water
December 19, 2011 by faith

chem
The normal melting point of copper is 1357 K and heat of fusion of Cu is 13.05 KJ. How much heat, in kilojoules, is evolved when a 3.70 kg sample of of molten Cu freezes?
February 11, 2010 by Joseph

physics
a heat engine operates between 403 K and 1263 K at 67% of Carnot efficiency. How much work can it produce from 5900J of input heat?
November 6, 2013 by Sara

Chemistry (really need help)
so I have posted this before but this is with some wrok.. Heres the question... When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 12.0 fluid ounce drink from 75F to 35F, if the heat capacity of the drink is 4.18 J/gC? (Assume that the heat ...
September 16, 2010 by Sarah

Physics 11th grade 'Heat' `
1) While Laurie is boiling water to cook spaghetti, the phone rings, and all 1.5 kg of water boils away during her conversation.If the water was initially at 15℃, how much heat must have been gained for all of it to turn into a water vapor? 2)By January, the 3.0 kg of ...
March 16, 2013 by Isis

Physics Heat
1) While Laurie is boiling water to cook spaghetti, the phone rings, and all 1.5 kg of water boils away during her conversation.If the water was initially at 15℃, how much heat must have been gained for all of it to turn into a water vapor? 2)By January, the 3.0 kg of ...
March 20, 2013 by Isis

Physics
how much work is required to lift a 98-N block of ice if A) it is lifted a vertical distance of 5-m.? B) you push the same block of ice up a 7-m long ramp using in acompare to the work required in b.? C) How does the work required in A compare to the work required in B.? D) ...
November 7, 2010 by Tyler

chemistry
what is the amount of heat required to heat 3.3kg of gold from 29 degrees celcius to 61 degrees celcius
August 26, 2012 by Amy Tillis

Chemistry
what is the amount of heat required to heat 3.3kg of gold from 29 degrees celcius to 61 degrees celcius?
August 30, 2012 by Amy Tillis

Chemisty
In an experiment, 23.0 g of ice at 25C is converted into steam with a temperature of 124C. How much heat is required for the process? The following data may be of use: vap = 2260 J/g; Hfus = 334 J/g; Cp(ice) = 2.06 J/g C; Cp(water) = 4.18 J/g C...
April 8, 2010 by Stephen

science dr bob
if it takes 31,500 joules of heat to warm 750g of water, what was the temperature change? My answer: Q = (M) (DeltaT) (c) Delta T=Q Delta T = 31,500J -------- 750gx 1.0cal/gCo Delta T = 42oC
April 25, 2008 by sam

Physics
During a particular thunderstorm, the elctric potential difference between the clouds and the groud is Vcloud-Vgroud = 10^9 volts with the cloud being at the higher potential. Now, there is a lightning flash in which a charge of -25C is transferred from the ground to the cloud...
January 26, 2010 by Es

chemistry
Suppose that the microwave radiation has a wavelength of 10.8 cm. How many photons are required to heat 215 mL of coffee from 25.0 ^\circ \rm C to 62.0 ^\circ \rm C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 \rm J/(g\cdot K), as...
November 8, 2010 by Dolapo

PHYSICS
Q1= An 85 cu.meter room. - How much energy required to heat room temperature from 5C to 22C. - How long in minutes Q2= - a 40 Liter radiator in the same room above. energy input is 5400 watts. In order to increase room temperature from 5C to 22C, how long 5400 Watts will be ...
May 31, 2012 by M BIL

Chemistry
18.0 g of liquid water is initially at 0 C. How much heat, in kJ, must be added to transform this into 18.0 g of steam at 200 C? The heat capacity of liquid water is 75.3 J/mol C. The heat capacity of steam is 37.4 J/mol C. The heat of vaporization is 40.65 kJ/mol.
December 16, 2011 by Kimmy

Chemistry
A quantity of ice at 0.0C was added to 25.6 g of water at 21.0C to give water at 0.0C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g C). I dont understand how to set this problem up (what the formula is and where to...
October 8, 2008 by Ryan

Chemistry
A quantity of ice at 0.0C was added to 25.6 g of water at 21.0C to give water at 0.0C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g C). I dont understand how to set this problem up (what the formula is and where to...
October 8, 2008 by Ryan

biology
A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50L container of cold water, what would be the approximate increase in the temperature of the water?
January 30, 2009 by Jack

science
Finishing his ginger ale, Ramesh stands at the party holding his insulated foam cup that has nothing in it but 0.100kg of ice at 0 degree celsius. How much heat must be gained by the ice in order for all of it to melt? How much more heat must be gained to raise the temperature...
January 9, 2012 by Debra

Physics
To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. When the water turns to ice during the night, heat is released into the plants, thereby giving them a ...
December 11, 2012 by Anonymous

chemistry
calculate the internal energy change for each of the following. a. one hundred(100.)joules of work are required to compress a gas. at the same time the gas releases 23 J of heat. b. a piston is compressed from a volume of 8.30 L to 2.80 L against a constant pressure of 1.90 ...
March 11, 2008 by kathy

AP Chemistry
A 500 g piece of metal at 60 degrees celsius is placed in 200g of water at 22 degrees celsius contained in a coffee cup calorimeter. The metal and water come to the same temperature at 32.5 degrees cesius. The specific heat of the water is 4.184 j/g(degrees celsius) a) how ...
February 15, 2010 by Matthew

Physics
What amount of heat is required to raise the temperature of 350 grams of copper to cause a 25C change? The specific heat of copper is 0.39 J/gC A. 2500 joules B. 2600 joules C. 3400 joules D. 3900 joules
April 24, 2013 by Fredrick

chem
45.0 grams of water vapor is cooled from 150 to 101 degrees celsius. How much heat energy was lost? heat= mass*specificheatsteam*deltaTemp
April 13, 2007 by jess

Chemistry
The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol K. The conversion of 50.0 g of ice at 0.00C to liquid water at 22.0C requires how much kJ of heat? Can someone explain how to do this, I tried but keep getting the wrong answer.
September 20, 2010 by Anonymous

urgent
how much heat energy is required to raise the temp of 5 kilograms of coal from 20 degrees celsius to 220 degrees celsius? A 314 J B 6,573 J C 1,314,718 J D 4,187,000 J You asked this question already. See my other posted answer.
August 3, 2005 by alf

physics
lead is a soft, dense metal with a specific heat of 0.028 kcal/kg degrees C, a melting point of 328.0 degrees C and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a 250.0 kg sample of lead with a temperature of 20.0 degrees Celsius? q1 = heat to move ...
November 21, 2006 by Erica

physics
What amount of heat is required to increase the temperature of 75.0 g of water from 22.3C to 36.1C? The specific heat of water is 4186 J/KgC.
March 5, 2012 by Anonymous

Physics / Heat Transfer
How much heat must be removed from a 200 g block of copper to lower its temperature from 302 oF to 68 oF? Specific heat of copper: c = 0.092 kcal/(kg K) a. 2.4 kcal b. 2400 kcal c. 18.4 kcal d. 12 kcal e. 26 kcal
January 30, 2013 by John

science
A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power. (a) How much electrical energy (in kWh) is used? b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?
September 3, 2010 by ashley

science
A microwave oven has a power requirement of 1248 W. A frozen dinner requires 6.9 min to heat on full power. (a) How much electrical energy (in kWh) is used? (b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?
February 10, 2011 by Renee

chemistry
If an iceberg at 0 degrees C has a mass of 200,000,000 kg, how much heat would be required to melt the entire iceberg and raise the melt water to 8.0 degrees C?
July 4, 2011 by lynn

physics
If an iceberg at 0 degrees C has a mass of 200,000,000 kg, how much heat would be required to melt the entire iceberg and raise the melt water to 8.0 degrees C?
July 4, 2011 by lynn

chemistry
How much energy (in kilojoules) is needed to heat 5.45g of ice from -12.0 C to 32.0 C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K x mol) for ice and 75.3 J/(k x mol) for liquid water
December 2, 2010 by emily

college chemistry
Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the following equation: CO2(s)--> CO2(g). When dry ice is added to warm water, heat from the water causes the dry ice to sublime more quickly. The evaporating carbon dioxide ...
November 9, 2009 by Eddie

Chemistry
Substance A has a normal fusion point of ‑10.0 oC, an enthalpy of fusion = 150.0 J g^-1; specific heats for the solid and the liquid are 3.00 and 6.20 J g^-1 oC^-1, respectively. How much heat, in J, is required to change 150 grams of A from a solid at 40.0 oC to a ...
November 8, 2011 by Kale

Physcial Science
Hey There, I have 4 questions that I am totally stumped on... Can anyone help? A 200-gram chunk of stuff rises in temperature by 3oC when you input 1200 calories of heat. What is its specific heat capacity? Answers A)50 cal/goC. B) 2 cal/goC. C) 5 cal/goC. D) 0.02 cal/goC. You...
September 23, 2011 by Anonymous

Physcial Science
Hey There, I have 4 questions that I am totally stumped on... Can anyone help? A 200-gram chunk of stuff rises in temperature by 3oC when you input 1200 calories of heat. What is its specific heat capacity? Answers A)50 cal/goC. B) 2 cal/goC. C) 5 cal/goC. D) 0.02 cal/goC. You...
September 23, 2011 by Anonymous

Physcial Science
Hey There, I have 4 questions that I am totally stumped on... Can anyone help? A 200-gram chunk of stuff rises in temperature by 3oC when you input 1200 calories of heat. What is its specific heat capacity? Answers A)50 cal/goC. B) 2 cal/goC. C) 5 cal/goC. D) 0.02 cal/goC. You...
September 23, 2011 by Anonymous

chemistry
(a) A person drinks four glasses of cold water (3.0C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in kJ) does the body have to supply to raise the temperature of the water to 37C, the body temperature? (b) How much heat would your body lose if you were...
November 14, 2011 by Amber

Physics
A 50.0 g silver spoon at 20.0 degrees Celsius is placed in a cup of coffee at 90.0 degrees C. How much heat does the spoon absorb from the coffee to reach a temp. of 89.0 degrees C? Rememeber this equation. It, or a slight modification of it, will work all of these heat ...
November 21, 2006 by Erica

science
what will cold air moving over a warm body of water create? A)a rain shadow affect B)lake effect snow C)an urban heat island D)higher temp. My answer is B, am i right of not please tell me your answer
November 15, 2012 by May

Physics ~Thermodynamics~
* Pressure * 1) what other ways can the pressure of a gas be changed? * Internal Energy * 2) A cup of hot tea is poured from a teapot, and a swimming pool if filled with cold water. a) Which one has a higher internal energy? b) Which has a higher average of kinetic energy? * ...
March 5, 2013 by Isis

Physics 11th grade 'Heat' .
Finishing his ginger ale, Ramesh stands at party holding his insulated foam cup that has nothing in it but 0.100 kg of ice at 0℃. 1) In sentence above, How much more heat must be gained to raise the temperature of the melted ice to room temperature of 23.0℃? 2)...
March 15, 2013 by Isis

physics
An open container holds ice of mass 0.540 kg at a temperature of -18.7 c The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 790 J/minute. The specific heat of ice to is 2100 J/kg . K and the heat of fusion for ice is 334 * 10^3 ...
April 19, 2012 by I

CHEMSIRTY
How much energy would it take to warm 30.0 g of water at 35 oC to the boiling point and boil all the liquid away?
December 16, 2010 by Miranda

chemistry
Sodium (Na) metal undergoes a chemical reaction with chlorine (Cl) gas to yield sodium Cl, or common table salt. If 1.00 g of sodium reacts with 1.54 g of chlorine, 2.54 g of sodium chloride is formed and 17.9 kJ of heat is released. How much sodium and how much chlorine is ...
September 4, 2012 by Ashley

Physics
Is warm water heating a person swimming in it, convection or conduction; what about warm water heating the air above it?
October 19, 2008 by Isobelle

Physics
Is warm water heating a person swimming in it, convection or conduction; what about warm water heating the air above it?
October 19, 2008 by Isobelle

Physics
Is warm water heating a person swimming in it, convection or conduction; what about warm water heating the air above it?
October 19, 2008 by Isobelle

Chemistry
1. How much heat is added to 40.0 g of ice at 20 o C to convert it to steam at 120 oC? 2. How much heat is added to 25.0 g of ice at 25 o C to convert it to steam at 120 oC? 3. How much heat is added to 10.0 g of ice at 20 o C to convert it to steam at 120 oC? 4. How much ...
January 2, 2013 by Briana

Chemistry
In the qualitative test for nitrate anion, the test goes like this: - Add dilute sodium hydroxide, then add a little aluminium powder. Warm. Why do we need to warm the mixture?
January 22, 2009 by janice

Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a poor conductor of heat ...
March 4, 2012 by Tracy

Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a poor conductor of heat ...
March 5, 2012 by Tracy

Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a poor conductor of heat ...
March 5, 2012 by Tracy

Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a poor conductor of heat ...
March 6, 2012 by Tracy

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