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March 26, 2017

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Number of results: 58,385

physics
what is the heat required to convert 0.1 kg of melting ice into steam at 100 degree celcius
May 20, 2014 by andy

science
A truck whose bed is 2.5m long, 1.5m wide,and 1m high delivering sand fro a sand-sculpture competition. How many trips must the truck make to deliver 7 cubic meters of sand?
October 8, 2012 by hilly

chemistry
the specific heat of water is 4.184 j/g-c(celcius). how much heat is required to raise the temperature of 5.0 g of water by 3.0 c(celcius)?
April 4, 2010 by demond

physics
How much heat must be added to 20 grams of water at 100 degrees Celsius to convert it to steam? My work Q = (20)(4.18 x 10^3)(100) = 8360000 J Is that the correct answer?
November 14, 2014 by Jiskha help

heat
how much heat energy is required to raise the temperature of 5 kilograms of coal from 20 degrees celsius to 220 degrees celsius? You will need the specific heat capacity for coal...you can look that up in a table in your text.. Heatenergy=masscoal*specificheatcoal*(change in ...
July 5, 2005 by vanice

physics
How much heat ( In calories)is needed to warm 200 grams of water from an initial temperature of 24 degrees celsits to a final temperature of 84 degrees celsuis
September 24, 2013 by teresa

main ideas
Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. A greenhouse used for plants stays warm because sunlight and heat coming through the glass roof are mostly trapped. The heat doesn't radiate back into the atmosphere because it'...
September 6, 2013 by bob

physics
water at 20°C has viscosity n=1.0*10^-3 Ns/m^2. sand grains have density 2400kg/m^3. suppose a 1.1 mm diameter sand grain is dropped into a 51m deep lake whose water is a constant 20°C. If the sand grain reaches terminal speed almost instantly (a quite good approximation), ...
November 2, 2011 by anna

physics
A girl throws a water-filled balloon at an angle of 50.0∘^\circ above the horizontal with a speed of 12.0m/s{\rm m}/{\rm s} . The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00m/s{\rm m}/{\...
May 17, 2014 by joe

Chemistry
The overall reaction in a commercial heat pack can be represented as shown below. 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) ΔH = -1652 kJ How much heat is released when 4.00 mol iron is reacted with excess O2? How much heat is released when 1.00 mol Fe2O3 is produced? How much heat is...
January 13, 2015 by Anonymous

math
Reggie has made a stew that is at 100 degree Fahrenheit and he wants to either heat it upto 165 degree F or cool down to 45 degree F. To heat up the stew,it will take atmost 45 minutes plus 1 minute for each degree raised.To cool down the stew,it will take atleast 10 minutes ...
March 2, 2016 by Munna

Physics
How much energy is required to change a 58 g ice cube from ice at −1◦C to steam at 101◦C? The specific heat of ice is 2090 J/kg ·◦ C and of water 4186 J/kg ·◦ C. The latent heat of fusion of water is 3.33 × 105 J/kg, its latent heat of ...
January 30, 2013 by Tiffany

Phyics
How much energy is required to change a 57 g ice cube from ice at −4◦C to steam at 107◦C? The specific heat of ice is 2090 J/kg ·◦ C and of water 4186 J/kg ·◦ C. The latent heat of fusion of water is 3.33 × 105 J/kg, its latent heat of ...
July 8, 2013 by Beatles Lover

chemistry
calculate the heat energy required to raise the temperature of a 500. gram iron pipe from 25 degress celcius to 100 degrees celcius. the specific heat for iron is .45 J/g degrees celcius
May 12, 2013 by andrea

chemistry
Calculate the total amount of heat (in calories) that would be required to convert 15.0 g of ice at 0 oC to 15.0 g of steam at 100 oC.
April 26, 2012 by david drame

Science
Calculate the amount of heat required to completely convert 1kg of water at 0°C to the boiling point at 100°C?
February 23, 2016 by Joe

physics
A 500 g steel block rotates on a steel table while attached to a 2.0-m-long massless rod. Compressed air fed through the rod is ejected from a Inozzle on the back of the block, exerting a thrust force of 3.5 N. The nozzle is 70^\circ from the radial line, as shown in the ...
November 10, 2010 by Kathleen

Physics
How much heat is required to raise the temperature of 70 g of water from 20 C to 80 C?
January 17, 2011 by Abida

chemistry
how much heat is required to vaporise 2 litres of ethanol
May 2, 2011 by liu

Chemistry
How much heat is required for 32.5g of Na2co3 to completely decompose?
June 4, 2015 by Jan

Chemistry
How much heat is required to melt 110g of ice at-45°C?
October 19, 2016 by Anna

physics
A pot containing 1.09 liter of water, initially at 18°C, is placed on a 1101 W electric heating element. (a) How much heat must be supplied to the water to bring it to a boil? (b) How much heat is necessary to boil all the water away? What is the minimum time required to boil...
April 9, 2012 by JOHN

Math
Danny needs to buy sand for this box. He wants to nearly fill the box leaving only 6 inches empty at the top. How much sand does Danny need if the length is 12 feet the width is 2 feet and the height is 3 feet. I first found the volume which was 72 feet and since 1 ft=12 ...
February 4, 2014 by Jerald

thete
A sample of beach sand contains sand particles of different colors, small pebbles, and also shells. Each component contains different metals and minerals. The pebbles and shells can easily be separated from the sand. Which term or terms could be used to describe this sample of...
February 19, 2015 by Anonymous

Physics
A truck runs into a pile of sand, moving 1.6m as it slows to a stop. The magnitude of the work that the sand does on the truck is 6.0×105J. What is its average force that the sand exerts on the truck?
February 19, 2015 by Derp

math
Triangle $ABC$ is a right triangle with right angle at $A$. Suppose $\overline{AX}$ is an altitude of the triangle, $\overline{AY}$ is an angle bisector of the triangle, and $\overline{AZ}$ is a median of the triangle, and $\angle XAY = 13^\circ$. If $X$ is on $\overline{BY...
November 10, 2016 by InfaRed

physical science
How much heat must be added to 1.0kg of steam at 100 degrees Celsius to convert it to steam at 110 degrees Celsius? How much heat must be added to 1.0 kg of water at 100 degrees Celsius to convert it to steam at 100 degrees Celsius?
July 5, 2011 by Randylin

chemistry
I am in need of help about this specific heat question. A 100.0g sample of aluminum released 1680 calories when cooled from 100.0 degrees C ti 20.0 degrees C. What is the specific heat of the metal? I tried setting it up: 1680 cal ________________________ 100.0 (100.0 *C- 20.0...
September 27, 2010 by Jena

physics
Archimedes decides to take a warm bath. If 1 calorie equals 4.187 Joules, and the heat of fusion of ice/water is 334 J/gram, calculate the number of calories it takes to liquefy a solid block of ice of mass 100 kg at 0°C. Use scientific notation.
June 17, 2012 by LL

Science (correct?)
(1) which of the following correctly identifies the methods of heat transfer? 1. A- convention B- radiaton C- conduction ~~~~~~~~~~~~~ 2. A- conduction B- radiaton C- convention ~~~~~~~~~~~~~ 3. A- convention B- conduction C- radiaton ~~~~~~~~~~~~~ 4. A- radiaton B- convention...
January 3, 2016 by Yuno Gasai

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0°C and a cold reservoir temperature of -20.0°C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kW...
July 25, 2013 by Justin

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0°C and a cold reservoir temperature of -20.0°C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kW...
July 26, 2013 by Justin

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0°C and a cold reservoir temperature of -20.0°C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kW...
July 28, 2013 by Justin

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0°C and a cold reservoir temperature of -20.0°C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kW...
July 28, 2013 by Justin

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

Chem
How much heat (in kJ)is required to convert 2.565kg of liquid sulfur dioxide at the boiling point to a gas at 60C? BP of SO2 is -10C and delta H vap is 25.73kJ/mol. Specific heat capacity of the gas is 0.622 J/g*K I don't know what formula to use to calculate this problem??
March 9, 2010 by Staci

science
how much heat is required to heat 500 g of copper from 20 degree celsius to 80 degree celsius? specific heat of copper is 0.093 cal/g- degree celsius
December 2, 2012 by sam

Geometry
A box is filled with 6 cans of tennis balls. If the emply space was filled with sand, how much sand is needed to fill the box? Each can has a radius of 2 in. Height of box is 12in.
June 9, 2011 by jean

Maths
The mass of a truck when loaded with sand is 2875,35kg .After unloading the sand it has mass of 2010,5kg.what is the mass of the sand?
August 27, 2014 by Kagiso sithole

Chem II
Sulfur dioxide is produce din enormous amounts for sulfuric acid production. It melts at -73 degrees C and boils at -10 degrees C. Its heat of fusion is 8.619 kJ/mol and its heat of vaporation is 25.73 kJ/mol. The specific heat capacities of the liquid and gas are .995 j/g*K ...
January 18, 2012 by Hailey

9th grade
If a 10.0 g piece of metal required 100 cal to raise its temperature by 20°C, what would you report as its specific heat?
September 8, 2010 by lanette

Chemistry
Hydrogen is burned in oxygen to release heat. How many grams of hydrogen gas must be burned to release enough heat to warm a 50.0 g block of iron, giving 5 mol of water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Iron has a specific heat of 0.449 J/(g·°C).
June 7, 2011 by Lance

Physics
How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...
February 27, 2012 by Abby

Physics
How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...
February 27, 2012 by Abby

Physics
How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...
February 27, 2012 by Abby

chm140
How much heat is required to melt 26.5 of ice at its melting point?
May 27, 2010 by Kathy

Cheistry
How much heat is required to melt 43.5g of ice at its melting point?
November 18, 2010 by Yvone Miles

Chemistry
How much heat is required to melt 43.5g of ice at its melting point?
November 18, 2010 by Yvone Miles

Chemistry
How much heat is required to melt 43.5g of ice at its melting point?
November 18, 2010 by Yvone Miles

Chemistry 101-URGENT
How much heat is required to melt 43.5 g of ice at 0°C?
November 18, 2010 by Cherly Young

Science
how much heat is required to change 5 grams of iron to 10c
October 13, 2011 by joe

phy
How much heat is required to raise the body temperature of a 60.0-kg woman from 37.0° C to 38.2° C?
April 17, 2013 by jessica

Chemistry
How much heat is required to boil 90.0g of water at its boiling point?
April 16, 2015 by Chemistry Boiling point

Chemistry
If 1.22 grams of magnesium reacts with 100 ml of 6.02 M HCl solution. How much heat is evolved? Density of the HCl solution is 1.10 g/ml. Assume the specific heat of water 4.184 J/gC is the specific heat of the solution. Mg  +  2 HCl   à  MgCl2  +  H2  
July 17, 2012 by Anonymous

chemistry
How much heat (in Joules) is gained by the water when a chemical reaction takes place in 100.0 ml aqueous solution, has a temperature increase of 10.20°C and a specific heat capacity of 4.180 J/°Cg? [Hint: ignore any effects of the calorimeter and solve for qwater]
March 31, 2014 by shelle

Chemistry
You have 23.0g of water initially at -46°C. How much energy in joules is required to heat the ice to 0°C? c ice = 2.1 J/g°C. I thought joules was calculated by grams*change in temperature*specific heat. The answer I get from 23*46*2.1 is 2221.8, but web assign says this is ...
March 1, 2015 by Harrison

chemistry
If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer. Is this how you would do this? Q= m*Hvap Q= m* 5.40 Q=100*5.40 Steam = 540 kg of steam?
May 11, 2015 by Student101

chemistry
Calculate the amount of heat absorbed when 58 g of steam at 117◦C are completely converted to ice at −32.5◦C. Specific Heat: H2O(s) = 2.09 J/g◦C H2O(l) = 4.18 J/g◦C H2O(g) = 2.03 J/g◦C Heat of Fusion = 334 J/g Heat of Vaporization = 2260 J/g...
November 15, 2014 by Q

chemistry
If you start with 146 g of water at 47◦C, how much heat must you add to convert all the liquid into vapor at 100◦C? Assume no heat is lost to the surroundings. Answer in units of kJ.
April 7, 2015 by kika

Chemistry
Calculate the total quantity of heat required to convert 25.0 g of liquid CCl4(l) from 25.0°C to gaseous CCl4 at 76.8°C (the normal boiling point for CCl4)? The specific heat of CCl4(l) is its heat of fusion is and its heat of vaporization is
April 13, 2010 by Bob

Lauren
The amount of heat required to raise temperature of 55.85 g of iron 1 degrees C is called its A. Change of energy B. Enthalpy C. Molar heat capacity D. Specific heat capacity E. Specific Heat.
November 16, 2007 by Chemistry

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 75°F to 35°F, if the heat capacity of the drink is 4.18 J/g·°C? (Assume that the heat...
September 16, 2010 by Sarah

Physics: Phase changes
how much heat is needed to convert 500g of water at 100 degrees C to steam at 100 degrees C?
March 21, 2011 by t

Physical Science
The sand on the beach heats up faster each day than the water does. You know this because when you walk on the beach in the early morning, your feet are cool. By noon, the beach is so hot, you cannot walk on it in bare feet . The ocean, however stays cool. Which one has the ...
October 20, 2014 by Bonni

chemistry
sample of liquid water at 100 degrees C absorbs 113 kJ of heat. HOw much water will be converted to steam heat vaporization if water is 2.26 kJ/g I just need help with what formula to set this up
July 20, 2011 by LG

Science
Roger made a mixture of salt and sand.Which of the following procedures explains the easiest way to separate the mixture? A.Pour the mixture into a glass of water and stir it until the salt dissolves.Pour the micture through a filter.Evaportate the water. B.Pour the mixture ...
April 23, 2012 by Rezu

Integrated Physics and Chemistry
Matching... Heat engine Heat pump Boiler Thermostat -a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or convection heating systems -a appliacne that controls the maintenance temperature of a heating system -an appliance ...
April 19, 2011 by Ashley

Chemistry
A 250 g mass of material has a temperature of –45˚C. Its specific heat is 0.36 J/gˑ˚C. How much heat energy is required to raise its temperature to 10˚C? (its melting point is 23 ˚C)
October 24, 2016 by Leandra

chemi
The heat of vaporization of benzene, C6H6, is 30.7 kJ/mol at its boiling point of 80.1 °C. How much energy in the form of heat is required to vaporize 134 g benzene at its boiling point?
January 21, 2017 by bobyiee

Chemistry
How much heat energy, in kilojoules, is required to convert 53.0 g of ice at -18.C to water at 25.0 C ?
December 9, 2011 by Morgan

chemistry
how much heat is required to melt 15 g of ice which is at a temperature of 0 degrees celsius
July 24, 2012 by johny

Chemistry
How much heat energy, in kilojoules, is required to convert 36.0g of ice at 18.0C to water at 25.0C
January 30, 2013 by Ashley

chemistry
how much heat is required when 6.00g of water is melted at its melting point
March 24, 2014 by chelsea

chem 20
100. G of a metal required 848 calories to be heated from 25 degrees celsius to 100 degrees celsius calculate the specific heat of the metal
September 10, 2013 by Anonymous

mathematical literacy
Brick layers makes mortal with cement lime sand and water in the ratio of 1:1:5:1 if they have 2bucket of lime, how much should they use for cement, sand and water?
February 9, 2017 by andiswa

Physics
How much heat is required to convert solid ice with a mass of 875 g and at a temperature of -11.5 °C to liquid water at a temperature of 52.0 °C? (The specific heat of ice is cice = 2100 J/kgK, the specific heat of water is cwater = 4186.8 J/kgK, and the heat of fusion for ...
April 18, 2015 by Karly

Solar Energy Please Help
a) Family Smith has already installed PV in their house. Now, they also want to cover their needs for warm water with solar energy. For this, they consider having a solar thermal water heating system. Considering that the need for warm water is 100L/day, the water has to be ...
October 26, 2013 by Anonymous

Science
When taking a bath, we use approximately 450 lbs of water. How much heat, measured in British Thermal Units (BTU) is required to heat the water from 60 degrees Fahrenheit to 104 degrees Fahrenheit?
September 9, 2014 by Ken

Chemistry
How much heat energy is required to heat up 50.0 grams of water from 20.2 degrees Celsius to 34.2 degrees Celsius? I want o use the Q=mc(change in temp) formula but I am only given the m and difference in temp in this question so I am not sure of what I am supposed to do.
September 4, 2016 by Kaitlyn

AP Physics
You go to kitchen to boil water. You pour 280 gram of water to a container, and put the container on a 293 W electric heater. Assume that all the heat from the heater is used to heat the water. The specific heat of water is 4.19 J/g ° C. As always, be accurate to 4 ...
December 3, 2009 by Sasami

science/math
A juice processing operation uses steam to heat the fruit juice up to a temperature of 96̊C prior to packaging it in drink boxes. They need to heat 3,250 kg of apple juice (10.5% solids) from an initial storage temperature of 39̊F to its heat treatment temperature. ...
February 6, 2012 by Nadine

ap chemistry
the heat of neutralization for a strong acid in dilute water solution is about 60 kJ/mol of H+. What quantity of heat in kJ is produced when 100 mL of 3 M HCl is mixed with 100 mL of 1 M KOH?
September 24, 2010 by Sarah

Chemistry
If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer.
May 6, 2015 by Student101

Chemistry
9. If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer.
July 20, 2015 by Tisha

Fantel
The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through the evaporation of 3.50 g of sweat?
March 28, 2012 by Joe

Chemistry
The heat of vaporization of benzene, C6H6, is 30.8kJ/mol at its boiling point of 80.1 degrees celsius. How much energy in the form of heat is required to vaporize 102g of benzene at its boiling point? I know that the answer is 24.2kJ but i am not sure how to get this.
February 5, 2012 by Hannah

chem
How much heat is required to raise the temperature of 200 g CH3OH from 20 to 30 degrees and then vaporize it at 30 degrees. The molar heat capacity of CH3OH is 81.1 J/Mol/K. Okay...the answer is approximately around 254. It was a homework problem. The question is how do you ...
February 15, 2010 by joseph

math
By mass a certain material is 75% sand and another is 30% sand. How many tonnes of each must be mixed in order to have 250 tonnes of material that is 50% sand?
April 11, 2015 by Mat

Physics
A soft drink can contains about 0.20 kg of liquid at 5 oC. Drinking this liquid can actually consume some of the fat in the body, since energy is needed to warm the water to body temperature (37 oC). How many kcal should the drink have so that it is in perfect balance with the...
September 20, 2010 by Eric

Biology
Which pulmonary volumes would change during exercise and which will not? Explain how AND why they would change. 1.) Tidal Volume 2.) Inspiratory Reserve Volume 3.) Expiratory Reserve Volume 4.) Residual Volume Thanks for the help Since this is not my area of expertise, I ...
April 17, 2007 by JYD

chemistry
If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer. Please help?
April 6, 2016 by emily

grid math
A sack of sand weigh 40.5kg. How much does does 5 sack of sand weigh?
February 16, 2017 by casmir

grid multiplication
A sack of sand weigh 40.5kg. How much does 5 sack of sand weigh?
February 16, 2017 by casmir

Chemistry
how much heat is required to vaporize 343 g of liquid ethanol at its boiling point?
April 8, 2010 by Anonymous

Physics
How much heat energy is required to convert 0.1000kg of ice at -10.0 C into water at 50 C?
December 8, 2011 by Dorrito

Chemistry
How much energy is required to melt and heat 25 grams of ice at 0ºC to 25ºC?
March 13, 2013 by Sarcasticqueen

chemistry
how much heat is required to vaporize 343g of liquid ethanol at its boiling point?
March 25, 2013 by tanya

chemistry
How many gallons of C6H12 , measured at 20 degrees Celsius, must be burned to provide enough heat to warm 26.4m3 of water from 17.4 degrees Celsius to 32.8 degrees Celsious , assuming that all the heat of combustion is transferred to the water, which has a specific heat of 4....
December 9, 2012 by Anonymous

Biology Lab
Hey! I am doing a biology lab in which we take liver and sand and place it in a test tube, to see it if it will react with hydrogen peroxide. One of the test tubes just has sand in it, and no reaction occurs. This is because the sand acts as a control and is inorganic meaning ...
February 25, 2008 by FOR A SCIENCE TEACHER

How do I solve for this??
How much heat (in Joules) is gained by the water when a chemical reaction takes place in 100.0 ml aqueous solution, has a temperature increase of 12.67°C and a specific heat capacity of 4.180 J/°Cg? [Hint: ignore any effects of the calorimeter and solve for qwater]
June 24, 2013 by Ashley

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