Friday

April 18, 2014

April 18, 2014

Number of results: 111,061

**Chemistry**

How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?
*Tuesday, March 20, 2012 at 12:17am by Derek*

**chemistry**

Calculate the amount of heat required to heat a 3.6{\rm kg} gold bar from 20^\circ {\rm C} to 70^\circ {\rm C}. Specific heat capacity of gold is 0.128 \rm J/g ^\circ C
*Friday, February 1, 2013 at 9:58am by Anonymous*

**chemistry**

Calculate the amount of heat required to heat a 3.7{\rm kg} gold bar from 30^\circ {\rm C} to 61^\circ {\rm C}. Specific heat capacity of gold is 0.128 \rm J/g ^\circ C
*Wednesday, September 19, 2012 at 1:21am by John*

**physics science**

if you wish to warm 95 kg of water by 20.0c for your bath how much heat is required
*Sunday, October 30, 2011 at 12:38pm by mary*

**Physics**

If you wish to warm 120 kg of water by 16°C for your bath, how much heat is required? ((The heat capacity of liquid water is 4186 J/(kg·oC) ) Q = M C *(delta T) delta T = 16 C (it means "change in temperature) M = 120 kg C = 4186 J/(kg·oC Multiply it out for the answer (Q, the...
*Tuesday, March 27, 2007 at 6:11pm by Paula*

**physics**

If you wish to warm 110kg of water by 18 degrees C for your bath how much heat is required? Heat= mass*specificheat*TempChange Put the mass in kg, choose the specific heat constant in units of J/(kg-C), and use the 18C as the temp change.
*Friday, October 27, 2006 at 3:57pm by Tonya*

**Math**

A contractor requires a cement mix that is 70% sand and 30% cement. He has 700 kg of a cement mix that is 80% sand and 20% cement. How much cement should he add so that he gets the required mix? My set up: required mix = (S)(.7) + (C)(3) 700kg = (S)(.8) + (C+X)(.2) Is this ...
*Thursday, August 25, 2011 at 3:10pm by Kyle*

**Science**

If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?
*Thursday, March 13, 2014 at 6:39am by Reggie*

**Physics**

If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?
*Thursday, March 13, 2014 at 1:43pm by Reggie*

**Chemistry**

How much heat is required to warm 229 g of ice from -45.3°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
*Sunday, April 22, 2012 at 3:03pm by Skrillex*

**science**

Which of the following would require more energy to heat it from 10°C to 20°C? a. 200 kg of water b. 200 kg of aluminum c. 100 kg of steel How much heat energy is required to raise the temperature of 20 kilograms of water from 0°C to 35°C?
*Thursday, February 7, 2013 at 4:23pm by edwin*

**chemistry**

a) how much heat is required to convert the ice to water that is also 0.00 C? b) how much heat would be required to warm this water from 0.00 C to 17.50 C? HELP!! I think the fusion is 333 J/g at 0 C... But I'm not sure what to do with that.
*Sunday, September 7, 2008 at 3:28pm by Jeff*

**physics**

if you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in calories and joules)
*Thursday, January 28, 2010 at 8:29pm by maria*

**Chemistry**

Consider a 27.5g piece of ice at 0.00C. a) how much heat is required to convert the ice to water that is also 0.00 C? b) how much heat would be required to warm this water from 0.00 C to 17.50 C? I don't understand the process of how to go about solving this problem.
*Sunday, September 7, 2008 at 4:14pm by Jeff*

**Chemistry**

How much heat is required to warm 225g of ice from -48.6C melt the ice warm the water from 0.0C to 100.0C boil the water and heat the steam to 173.0C
*Monday, February 22, 2010 at 11:28pm by Anonymous*

**Chemistry**

Consider a 27.5 g piece of ice at 0.00 C. a) how much heat is required to convert the ice to water that is also 0.00 C? b) how much heat would be required to warm this water from 0.00 C to 17.50 C? HELP!! I think the fusion is 333 J/g at 0 C... But I'm not sure what to do with...
*Sunday, September 7, 2008 at 2:04pm by Jeff*

**Math**

A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4°C to a final temperature of 65°C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85°C. Calculate the ...
*Sunday, February 17, 2013 at 11:19am by Paul*

**chem.**

How much heat would be required to warm Earth's oceans by 1.0 degree celsius ? Assume that the volume of Earth's oceans is 137x10^7 km^3 and that the density of seawater is 1.03 g/cm^3. Also assume that the heat capacity of seawater is the same as that of water. Earth's oceans...
*Friday, February 5, 2010 at 4:28pm by Al*

**Chemistry**

Why does sand tends to get hotter than water? I'm sure this isn't the question you intended. Sand gets hotter than water if more heat is applied to sand than to water. Or it can get hotter if there is less sand to heat than water. You may have meant to ask why it takes more or...
*Tuesday, November 28, 2006 at 5:16pm by Lisa*

**chemistry**

How much heat is required to warm 1.60 L of water from 26.0 degree C to 100.0 degree C? (Assume a density of {1.0 g/ml for the water.)
*Monday, October 18, 2010 at 3:05pm by Mely*

**chem**

Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 21.5 g sample of a metal that absorbs 685 J when temperature increases from 42.1^\circ C to83.2^\circ C.
*Thursday, June 10, 2010 at 5:10pm by andy*

**chem**

Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 21.5 g sample of a metal that absorbs 685 J when temperature increases from 42.1^\circ C to83.2^\circ C
*Wednesday, December 12, 2012 at 2:24pm by HUYGEn*

**Chemistry**

How many grams of ice at -26.5\, ^\circ C can be completely converted to liquid at 15.0\, ^\circ C if the available heat for this process is 4.50×103 kJ? For ice, use a specific heat of 2.01J/(g\cdot{ ^\circ C}) and H2 = 6.01 kJ/mol.
*Sunday, November 21, 2010 at 3:51pm by Bella*

**AP Chemistry**

Convert 93 gallons H2O to grams. I would use 1 gallon = 3.785 L, convert to mL then use density of 1.00 g/mL to solve for grams. How much heat is required to heat this much water (in grams) from 60 F to 99 F. Convert 60 F and 99 F to C using (F-32)*5/9 = C. Then q = heat ...
*Friday, October 11, 2013 at 6:09pm by DrBob222*

**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...
*Monday, November 8, 2010 at 9:37pm by Dolapo*

**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?
*Wednesday, April 17, 2013 at 10:36am by jessica*

**Physics Heat**

1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0-kg vat of water from 20.0℃ to 100.0℃? Formula>> Q=mTcp 2)Under the spreading chestnut tree of the village blacksmith dunks red-hot...
*Wednesday, April 10, 2013 at 6:30pm by Isis*

**Chemistry**

A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at 25 °C. Assuming no heat is lost to the atmosphere, what is the final temperature of the sand?
*Thursday, March 7, 2013 at 2:52am by John*

**Chemistry**

A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at 25 °C. Assuming no heat is lost to the atmosphere, what is the final temperature of the sand?
*Thursday, March 7, 2013 at 2:59am by John*

**chem 101**

This is second part is built off the first question. These are all from a practice test. How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F? correct answer: 279kj How much alcohol must be burned to generate enough heat to ...
*Sunday, April 15, 2012 at 7:44pm by Anonymous*

**chm**

The specific heat of fat is 0.45 cal/(g) , and the density of fat is 0.94 g/cm^3 . How much energy (in calories) is needed to heat 22 cm^3 of fat from room temperature (25 ^\circ {\rm C}) to its melting point (35 ^\circ {\rm C})?
*Thursday, September 12, 2013 at 12:36pm by Anonymous*

**chemistry**

How much heat is required to warm 250.4 g of water from 22.6 C to 75.8 C given that the specific heat capacity of water is 4.184 J/gx degrees C?
*Thursday, November 3, 2011 at 12:24pm by Teresa*

**chem**

The specific heat of silver is 0.237 J/goC Its melting point is 961oC . Its heat of fusion is 11 J/g. How much heat (in J) is needed to change 17.5 g of silver from solid at 25oC to liquid at 961oC ? Add the heat required to warm the silver from room temp to the mp. Then add ...
*Tuesday, October 31, 2006 at 7:59pm by mary*

**physics**

An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same amount of 0°C water. (a) How much heat in kcal is required to raise the temperature of 0.700 kg of water from 0°C to 27.0°C? (b) How much heat is required to first melt 0.700 kg...
*Friday, July 19, 2013 at 11:03pm by Eric*

**enthalpy change**

The heat required to raise the beaker temperature will be 3/4 as much the second time, becasue of the delta-T rTIO. The heat required to heat the liquid will be higher by a factor (200/250)(2.43/0.67) = 2.90 Calculate the total heat required in the second case. The ratio (heat...
*Sunday, October 10, 2010 at 6:30pm by drwls*

**Physics Hear**

1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0-kg vat of water from 20.0℃ to 100.0℃? Formula>> Q=mTcp 2)Under the spreading chestnut tree of the village blacksmith dunks red-hot...
*Thursday, April 11, 2013 at 6:11am by Isis*

**please help with this question need to know by 8/4**

How much heat energy is required to raise the temp of 5 kilograms of coal from 20 degree celsius to 220 degrees celsius? 314 j 6,573 j 4,187,000 j 1,314,718 j You need the specfifc heat of coal to answer that question, and that depends somewhat upon the type. Did they mention ...
*Wednesday, August 3, 2005 at 9:24pm by alf*

**chemistry**

Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth's oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global warming. ...
*Friday, February 5, 2010 at 2:44am by Al*

**physics**

A puddle filled with 20. kg of water is completely frozen to -6.0 degrees celcius in the middle of winter. How much heat must be absorbed by the puddle to melt the ice and warm the water up to 20. celcius during the spring thaw?
*Wednesday, January 27, 2010 at 6:20pm by trav*

**Physics**

A meteor has a speed of 90.0 m/s when 900 km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.19 m. (a) What is its speed before striking the sand? (b) How much work does the sand do to stop the ...
*Wednesday, February 26, 2014 at 10:28pm by Anonymous*

**chemistry**

How much heat (in ) is required to warm 11.0 of ice, initially at -13.0, to steam at 111.0? The heat capacity of ice is 2.09 and that of steam is 2.01
*Tuesday, January 31, 2012 at 6:32pm by Anonymous*

**science**

How much heat is required to warm 225g of ice from -46.8 degree celcius to 0.0 degree celcius, melt the ice, warm the water from 0.0 degree celcius to 100.0 degree celcius, boil water, and heat the steam to 173.0 degree celcius.
*Thursday, March 31, 2011 at 11:21pm by kayt*

**Chemistry Honors 10th **

How much heat is required to warm 122 g of water by 23.0 degrees Celsius?
*Wednesday, April 21, 2010 at 4:46pm by Bria*

**mechanical systems**

how much heat is required to warm 1500 gallons of water from 70 to 140 degrees F?
*Sunday, April 15, 2012 at 10:03pm by Steve*

**Science check**

I was wondering if someone could check the problems for me? Thanks I can go back and show work if needed..this was just easier to type out. 1)An object has a mass of 615 grams and a volume of 105cm3.What is the density of the object? answer 5.86 gm/cm3 2) A player uses a ...
*Tuesday, May 29, 2007 at 4:40pm by Anonymous*

**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 ...
*Wednesday, January 30, 2013 at 5:59pm 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 ...
*Monday, July 8, 2013 at 7:12pm by Beatles Lover *

**chem**

The heat of combustion of bituminous coal is 2.50 × 104 J/g. What quantity of the coal is required to produce the energy to convert 137.7 pounds of ice at 0.00°C to steam at 100.°C? specific heat (ice) = 2.10 J/g°C specific heat (water) = 4.18 J/g°C heat of fusion = 333 J/g ...
*Wednesday, December 15, 2010 at 11:37am by Bogdanam*

**Physics**

How much heat is required to raise the temperature of a 4.3-kg block of steel by 48 K? (The specific heat of this steel is 450 J/kg · K.)
*Tuesday, July 31, 2012 at 8:07pm by Sierra*

**chemistry**

How much heat (in Kj ) is required to warm 10.0g of ice, initially at -11.0 C, to steam at 112.0 C?
*Friday, April 20, 2012 at 8:07pm by haley*

**Chemistry**

How much heat (in Kj ) is required to warm 10.0g of ice, initially at -11.0 C, to steam at 112.0 C?
*Friday, April 20, 2012 at 8:11pm by Haley*

**physics**

(a) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of water. (b) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of iron.
*Monday, April 9, 2012 at 12:17am by JOHN*

**Physics**

How much heat is required to raise by 10.30°C the temperature of 1.2 kg of water? How much heat is required to raise by 10.30°C the temperature of 1.2 kg of iron?
*Monday, April 16, 2012 at 5:39pm by Alex*

**chem**

Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C.
*Thursday, June 10, 2010 at 5:10pm by andy*

**chemistry**

Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C
*Sunday, September 12, 2010 at 12:21am by bob*

**Chem104**

Calculate the specific heat \((\rm{J/g \; ^\circ C})\) for a 18.5-\(\rm g\) sample of tin that absorbs 183 \({\rm J}\) when temperature increases from 35.0 \(^\circ \rm C\) to 78.6 \(^\circ \rm C\).
*Saturday, October 12, 2013 at 6:07pm by Thobile*

**science**

A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and exits as water condensate...
*Monday, March 4, 2013 at 8:02pm by Bev*

**physical science**

Lead is a soft, dense metal with a specific heat of 0.028 kcal/kg·C°, a melting point of 328.0°C, 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 20.0°C?
*Tuesday, October 12, 2010 at 10:56pm by Anonymous*

**math**

how much heat would be required to warm Earths ocean by 1.0 degrees C assuming that the volume is 137*10^7 km ^3 and the density of sea water is 1.03 g/cm 3. also assume that the heat capacity of seawater is the same as that of water
*Monday, January 24, 2011 at 11:08pm by marie*

**Food Chemestry**

A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and exits as water condensate...
*Monday, March 4, 2013 at 7:27pm by Bev*

**Physics**

A 100 kg steam boiler is made of steel and contains 200 kg of water at 5.00°C. How much heat is required to raise the temperature of both the boiler and water to 100°C? The specific heat of Steel is 0.115kcal/kg°C. The specific heat of Water is 1.00kcal/kg°C
*Monday, April 2, 2012 at 11:54am by Madison*

**science**

5.imagine you are at the beach on a very hot day. you walk toward the water. the sand is eextremly hot. when you reach the water, you find that the water is much cooler than sand. a) using the term heat capacity, explain why the sand is hot and water is cool b)predict what the...
*Sunday, September 12, 2010 at 11:52am by shweta*

**chemistry**

95.0mLmL of H2O\rm H_2O is initially at room temperature (22.0∘C\rm{} ^{\circ}C). A chilled steel rod at 2.0∘C\rm ^{\circ}C is placed in the water. If the final temperature of the system is 21.3∘C^{\circ}C, what is the mass of the steel bar? Specific heat of ...
*Tuesday, March 11, 2014 at 10:28pm by Anna*

**science**

5.imagine you are at the beach on a very hot day. you walk toward the water. the sand is eextremly hot. when you reach the water, you find that the water is much cooler than sand. a) using the term heat capacity, explain why the sand is hot and water is cool b)predict what ...
*Sunday, September 12, 2010 at 1:21pm by shweta*

**dr bob**

how much heat would be required to warm Earths ocean by 1.0 degrees C assuming that the volume is 137*10^7 km ^3 and the density of sea water is 1.03 g/cm 3. also assume that the heat capacity of seawater is the same as that of water
*Monday, January 24, 2011 at 11:33pm by marie*

**Physical Science**

Suppose you want to heat 40 kg of water by 20 C. How many joules of heat are required?
*Saturday, November 14, 2009 at 3:52pm by Roberta*

**chemisty**

get a piece of ice, rub it on your arm until it melts. Do you feel the heat leaving your body to melt the ice? how much heat was required to melt one gram of a sample ice and warm it to the body temperature of 37 degress celcius? Heat= Heatfusion*massice + masswater*c*deltaTemp
*Monday, May 21, 2007 at 8:36pm by jennifer lowman*

**physics**

calculate the amount of heat energy required to raise the temperature of a 5kg block of solid platinum from 0 degrees celsius to 25 degrees celsius. the specific heat of platinum is 133j/kg k. how much heat energy is required to raise 5kg of water by the same amount? the ...
*Saturday, January 8, 2011 at 11:59am by charlie*

**chemistry**

How much heat in kilojoules is required to warm 10.0 of ice, initially at -10.0, to steam at 120. The heat capacity of ice is 2.09 and that of steam is 1.84 .
*Sunday, September 7, 2008 at 3:28pm by Christine*

**chem/math**

hang on I dont know why it keeps doing that. how much heat would be required to warm Earths ocean by 1.0 degrees C assuming that the volume is 137*10^7 km ^3 and the density of sea water is 1.03 g/cm 3. also assume that the heat capacity of seawater is the same as that of water
*Monday, January 24, 2011 at 10:32pm by marie*

**Chemistry (Thermo)**

Your answer to (a) looks correct. For (b), divided the heat release by the heat of fusion of water, 333 Kj per kg. For (c), divide the heat realse by (333 +418 kJ) = 551 kJ/kg For (c) add the heat of vaporization to the amount of heat required per kg, and divde that into the ...
*Friday, September 10, 2010 at 10:25am by drwls*

**college physics**

A 0.580-kg bucket rests on a scale. Into this bucket you pour sand at the constant rate of 85.0 g/s. A)If the sand lands in the bucket with a speed of 4.30 m/s, what is the reading of the scale when there is 0.770 kg of sand in the bucket? B)What is the weight of the bucket ...
*Thursday, March 18, 2010 at 11:04pm by Kyle*

**Chemistry**

How much heat (in kJ) is required to warm 12.0g of ice, initially at -12.0C, to steam at 111.0?C The heat capacity of ice is 2.09J/(g*C) and that of steam is 2.01J/(g*C). I got 5.64 but I did something wrong apparently.
*Thursday, November 15, 2012 at 4:01pm by NeedHelp*

**Chemistry**

Topic: Sublimation and Fusion How much heat (in kJ) is required to warm 13.0 g of ice, initially at -14.0 C, to steam at 112.0 °C? The heat capacity of ice is 2.09 J/g⋅°C and that of steam is 2.01 J/g⋅°C. Any help on how to start this is really appreciated.
*Sunday, March 29, 2009 at 4:34pm by Pete*

**physics**

What would be the final temp when 100 kg of 0 degrees Celcius cold water is mixed with 60 kg of 35 degrees warm water? Ans is in degrees Celcius. The sum of the heats gained is zero (remember one will lose heat, so have a negative heat gained). Heatgained by cold water + heat ...
*Thursday, March 29, 2007 at 12:38am by Kristina*

**Maths**

Sacks are filled with 100 kg of sand corect to the nearest 10 kg. what is the least possible amout of sand and the greatest possible amound of sand in a sack?
*Sunday, October 2, 2011 at 10:16am by Alex lloyd*

**physics**

1 liter of water has a mass of 1.00 kg Energy added in one hour = 3600 s * 350 J/s = 1.26*10^6 J Energy required to heat all of the water to 100C (the boiling point) = 1 kg*60 K*4200 J/kgK = = 2.52*10^5 J Energy available to boil water = 1.26*10^6 - 0.252*10^6 = 0.998*10^6 J ...
*Sunday, August 7, 2011 at 5:32am by drwls*

**physics 2**

Power = i^2 R energy = power * time = i^2 R t in Joules t = 60 seconds set that equal to heat energy used to warm the battery type this into Google search box 0.2 kcal/kg K = Joules/kg K to get C = 836.8 J/kg K i^2 R t = 836.8 * 20kg * (delta T) solve for delta T
*Thursday, February 20, 2014 at 4:44am by Damon*

**physics**

A 40.0 kg crate is initially moving with a velocity that has magnitude 4.09 m/s in a direction 37.0 ^\circ west of north. How much work must be done on the crate to change its velocity to 5.49 m/s in a direction 63.0 ^\circ south of east?
*Sunday, February 19, 2012 at 1:18pm by Colton*

**chemistry**

the specific heat of ethanol is o.58 cal/g c how much energy is required to heat 60.0 g of ethanol for 25 g c to 45 c
*Thursday, August 23, 2012 at 4:18pm by kathy ascencio*

**chemistry**

The specific heat of iron is approximately 0.45 J/g °C. How much heat energy is required to raise a 40 g sample of aluminum from 40 °C to 60 °C?
*Wednesday, April 4, 2012 at 1:26pm by esmi*

**Math- college**

A company has to ship 1148 kg of sand,if one bag can hold 13kb of sand how many bags can company fill in with sand. How many kilogram of sand will be left over.
*Friday, May 13, 2011 at 2:44am by Felicia*

**Physics**

How much heat is required to bring the block of ice up to 0C? How much heat is required to melt the ice at 0C? If there is heat left over, then final temp can be calculated by Heatleftover=10kg*specificheatwater(Tf-0) solve for Tf. The statement "the block absorbs 4.10106 J of...
*Sunday, April 6, 2008 at 9:01am by bobpursley*

**chemistry**

how much heat would be required to warm the earth's oceans by 1 degree celcius if the volume of the earths oceans is 137x100000000km3 and the density of the seawater is 1.03g/cm3
*Saturday, May 25, 2013 at 6:44pm by Kay*

**Physics _ Please help**

25 kg of ice at 0° C is combined with 4 kg of steam at 100° C. What is the final equilibrium temperature in ° C of the system? (Lf = 3.33 x 105 J/kg; Lv 2.26 x 106 J/kg, specific heat capacity of water =4186 J/(kg.K)) Question 2 options: A) 40 B) 20 C) 60 D) 100 E) 8
*Friday, August 12, 2011 at 10:45am by Maya*

**physics**

On a cold winter day when the temperature is -20 degrees celsius, what is the amount of heat needed to warm internal body temp(37) the .5 L of air exchanged with each breath? Specific heat of air is 1020 J/(kg K) and that 1.0L air has a mass of 1.3g. Please help!! I dont know ...
*Monday, November 30, 2009 at 10:43pm by Joe*

**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 ...
*Wednesday, January 18, 2012 at 4:54pm by Hailey*

**math**

A solar home contains 3.50 multiplied by 105 kg of concrete (specific heat = 1.00 kJ/kg·K). How much heat is given off by the concrete when it cools from 29 to 20°C?
*Tuesday, November 13, 2012 at 9:20pm by Adam*

**chem/math**

How much heat would be required to warm Earth¡¯s oceans by 1.0 ¡ãC? Assume that the volume of Earth¡¯s oceans is 137 x ¡¼10¡½^7 ¡¼km¡½^3 and that the density of sea water is 1.03 g/cm3. Also assume that the heat capacity of seawater is the same as that of water.
*Monday, January 24, 2011 at 10:32pm by marie*

**chem/math**

how much heat would be required to warm Earth¡¯s oceans by 1.0 ¡ãC? Assume that the volume of Earth¡¯s oceans is 137 x ¡¼10¡½^7 ¡¼km¡½^3 and that the density of sea water is 1.03 g/cm3. Also assume that the heat capacity of seawater is the same as that of water.
*Monday, January 24, 2011 at 10:32pm by marie*

**please help idin't get it**

5.imagine you are at the beach on a very hot day. you walk toward the water. the sand is eextremly hot. when you reach the water, you find that the water is much cooler than sand. b)predict what the air temprature would be relative to the sand and water temp.. explain your ...
*Sunday, September 12, 2010 at 2:44pm by shweta*

**physics**

Q = Pt = mc(T2-T1) where Q = heat/energy (in J) P = Power (in W) t = time (in s) m = mass (in kg) c = specific heat capacity (in J/kg-K) = 4.184 J/kg-K for water T = temperature (in C or K) we're solving for mass. substituting, (7.5*1000)*(3*24*60*60) = m*4.184*(70-18) ...
*Thursday, October 27, 2011 at 12:45am by Jai*

**Chemistry (Thermo)**

Your answer to (a) looks correct. For (b), divided the heat release by the heat of fusion of water, 333 Kj per kg. For (c), divide the heat realse by (333 +418 kJ) = 551 kJ/kg Note:I believe drwls make a typo here. I think he meant to type 751 and not 551. :-) For (c) add the ...
*Friday, September 10, 2010 at 10:25am by DrBob222*

**chem 101**

How much alcohol must be burned to generate 279kj of heat to warm the water as described in problem 3?(from 60 F to 180 F) a. 18.7 g b. 2.9 g c. 1.6 g d. 10.4 g e. 9.3 g the answer is D help with solution?
*Friday, April 13, 2012 at 2:37pm by Anonymous*

**physics**

Air does not conduct heat very well. For that reason your body heat does not pass through the air in your clothes very fast and you stay warm. However, to work the air has to be still. If it is allowed to move it will convect (as opposed to conduct) the heat away quickly. ...
*Thursday, January 24, 2008 at 1:08pm by Damon*

**chemistry**

A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C. How much heat is required? The specific heat of water is 1000 cal/kg · degrees C. Answer in units of cal
*Tuesday, April 24, 2012 at 6:34pm by please help*

**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...
*Monday, September 20, 2010 at 9:31am by Eric*

**math**

sand = 30 - 12 kg = 18 kg per load Now, he did this 5 times amount of sand moved = 5(18) = 90 kg = 90000 g , since 1 kg = 1000 g (kilo --> thousand)
*Thursday, May 2, 2013 at 7:03am by Reiny*

**chem**

A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C. How much heat is required? The specific heat of water is 1000 cal/kg · degrees C. Answer in units of cal I got 644000, is that right?
*Wednesday, April 25, 2012 at 11:13pm by luke*

**Physical science**

How much energy would be needed to warm 1.5 L of water from 0 °C to 25 °C? The specific heat capacity of water is 4186 J/kg/°C.
*Tuesday, February 5, 2013 at 8:33pm by Josh*

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