Saturday

October 1, 2016
Number of results: 55,770

**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

*September 19, 2012 by John*

**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

*February 1, 2013 by Anonymous*

**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.

*June 10, 2010 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

*September 12, 2010 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 \(^\circ \rm C\).

*October 12, 2013 by Thobile*

**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.

*June 10, 2010 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

*December 12, 2012 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.

*November 21, 2010 by Bella*

**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*

**chemistry**

A silver block, initially at 59.4∘C^\circ C, is submerged into 100.0 g{\rm g} of water at 25.3∘C^\circ C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 27.6∘C^\circ C.

*May 6, 2014 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})?

*September 12, 2013 by Anonymous*

**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 ...

*March 11, 2014 by Anna*

**math**

In the diagram, $\angle A = 30^\circ$, $\overarc{DE} = 170^\circ$, and $\overarc{BC} = 110^\circ$. Find the measure of arc $CE$, in degrees.

*September 3, 2015 by Bruh*

**math**

In the diagram, $\angle A = 30^\circ$, $\overarc{DE} = 170^\circ$, and $\overarc{BC} = 110^\circ$. Find the measure of arc $CE$, in degrees.

*September 3, 2015 by Bruh*

**chemistry**

When 0.558g of biphenyl (C_12H_10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.7^\circ C to 30.1^\circ C. Find DeltaE_rxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined in a separate ...

*December 19, 2012 by savannah*

**chemistry**

assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water is 0.0 ^\circ {\rm C} and K_f is equal to 1.86 ^\circ {\rm C}/m.

*February 6, 2012 by a*

**Chemistry**

How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?

*March 20, 2012 by Derek*

**chemistry**

Calculate the enthalpy change, ÄH DeltaH, for the process in which 12.7g g of water is converted from liquid at 7.3 ∘ C \, ^\circ C to vapor at 25.0 ∘ C \, ^\circ C . For water, ÄH vap \Delta H_{\rm vap} = 44.0kJ/mol kJ/mol at 25.0 ∘ C \, ^\circ C and s s = 4...

*April 20, 2014 by ntombiningi*

**Chemistry**

Four ice cubes at exactly 0 ^\circ {\rm{C}} having a total mass of 55.0g are combined with 110g of water at 77^\circ C in an insulated container. Part A If no heat is lost to the surroundings, what will be the final temperature of the mixture?

*January 22, 2013 by Brittany*

**chemistry**

How many grams of water can be cooled from 35^\circ {\rm C} to 16^\circ {\rm C} by the evaporation of 57{\rm g} of water? (The heat of vaporization of water in this temperature range is 2.4 {\rm kJ}/{\rm g}. The specific heat of water is 4.18 {\rm J}/{\rm g}\cdot {\rm K}.)

*April 4, 2013 by Anonymous*

**math **

Determine the energy to heat a cube of gold with a volume of 19.0{\rm cm}^{3} from 15^\circ C to 37^\circ C. (Figure 1) Refer to the tables of densities (Figure 2) and to the table of the specific heats (Figure 3)

*January 24, 2013 by Anonymous*

**Math**

In trapezoid $ABCD$, $\overline{BC} \parallel \overline{AD}$, $\angle ABD = 105^\circ$, $\angle A = 43^\circ$, and $\angle C = 141^\circ$. Find $\angle CBD$, in degrees.

*April 22, 2016 by justarandomboy*

**Chemistry **

How much heat is required to warm 1.60kg of sand from 22.0∘C to 100.0∘C? The heat capacity of sand is 0.84 J⋅g−1⋅K−1

*October 30, 2014 by Steve Smeck*

**chemistry**

25.6 {\rm mL} of ethanol (density =0.789 {\rm g}/{\rm mL}) initially at 8.0^\circ {\rm C} is mixed with 39.5 {\rm mL} of water (density = 1.0 {\rm g}/{\rm mL}) initially at 23.1^\circ {\rm C} in an insulated beaker. Assuming that no heat is lost, what is the final temperature ...

*February 22, 2012 by MD*

**chem**

calories given off when 81 {\rm g} of water cools from 46^\circ C to 23^\circ C

*September 14, 2011 by Anonymous*

**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?

*February 19, 2012 by Colton*

**math**

Suppose z is a complex number such that z^5 = -\sqrt{3} + i and z = \sqrt[5]{2} ( \cos n^{\circ} + i \sin n^{\circ}) , where 270 < n < 360 . Find the exact value of n .

*March 27, 2013 by John*

**geometry**

Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then what is \angle EZD+\...

*July 23, 2014 by kat*

**geometry**

Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then what is \angle EZD+\...

*July 23, 2014 by kat*

**Geometry **

Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then what is \angle EZD+\...

*December 16, 2014 by Krash*

**Pyhsics **

What would be the final temperature of a mixture of 50 g{\rm g} of 17∘C^\circ C water and 50 g{\rm g} of 44∘C^\circ C water? I have no clue where I should even begin please help.

*April 10, 2014 by Kimmie *

**chemistry**

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH_4NO_3(s) rightarrow NH_4...

*December 19, 2012 by savannah*

**Chemistry**

What is the normal boiling point in ∘ C ^\circ {\rm C} of a solution prepared by dissolving 1.50 g {\rm g} of aspirin (acetylsalicylic acid, C 9 H 8 O 4 {\rm C}_{9}{\rm H}_{8}{\rm O}_{4}) in 75.00 g {\rm g} of chloroform (CHCl 3 ) ({\rm CHCl}_{3})? The normal boiling ...

*February 4, 2014 by Ren*

**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

*February 22, 2010 by Anonymous*

**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?

*April 22, 2012 by Skrillex*

**chemistry **

A sample of gas in a balloon has an initial temperature of 25\({\rm \, ^{\circ}C}\) and a volume of 1670\({\rm L}\) . If the temperature changes to 82\({\rm \, ^{\circ}C}\) , and there is no change of pressure or amount of gas, what is the new volume, \(\texttip{V_{\rm 2}}{V_2...

*October 29, 2013 by Abby*

**chemistry**

The use of the British thermal unit (Btu {\rm Btu}) is common in much engineering work. (1 Btu {\rm Btu} = 1054J {\rm J}) A Btu {\rm Btu} is the amount of heat required to raise the temperature of 1 lb {\rm lb} of water by 1 ∘ F ^\circ {\rm F}. How many quads of energy ...

*October 7, 2013 by Anonymous*

**chemistry**

How much boiling water would you need in order to raise the bath to body temperature (about 37\rm {}^\circ C)? Assume that no heat is transferred to the surrounding environment.

*November 10, 2010 by John*

**phisics**

A spelunker is surveying a cave. She follows a passage 150m straight west, then 270m in a direction 45^\circ east of south, and then 280 {\rm m} at 30^\circ east of north. After a fourth unmeasured displacement, she finds herself back where she started.Use a scale drawing to ...

*January 19, 2013 by epifanio*

**chemistry**

Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 \rm J/(g \cdot {^\circ C}) and 1.00 \rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.

*December 4, 2011 by Anonymous*

**CRC**

A sample of ideal gas is in a sealed container. The pressure of the gas is 675torr , and the temperature is 28\, ^{\circ}C . If the temperature changes to 91\, ^{\circ}C with no change in volume or amount of gas, what is the new pressure, P_2, of the gas inside the container?

*April 28, 2013 by Touch*

**PHSICS**

A laser beam in air is incident on a liquid at an angle of 40.0^\circ with respect to the normal. The laser beam's angle in the liquid is 25.0^\circ.What is the liquid's index of refraction? PLEASE HELP!!!

*January 28, 2010 by elina*

**physic**

A laser beam in air is incident on a liquid at an angle of 40.0^\circ with respect to the normal. The laser beam's angle in the liquid is 25.0^\circ.What is the liquid's index of refraction?

*January 28, 2010 by elina*

**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.

*September 7, 2008 by Jeff*

**Math- PLEASE HELP**

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

*April 21, 2016 by Stephen *

**Geometry**

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

*April 19, 2016 by Sally*

**Geometry**

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

*April 19, 2016 by Sally*

**Geometry**

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

*April 19, 2016 by Bill*

**Geometry**

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

*April 21, 2016 by Bindi *

**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)

*January 28, 2010 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.

*September 7, 2008 by Jeff*

**chem**

If you used the 8900 kilojoules you expend in energy in one day to heat 46000 {\rm g} of water at 25^\circ {\rm C}, what would be the rise in temperature?

*September 14, 2011 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...

*September 7, 2008 by Jeff*

**physics**

The coefficient of kinetic friction for a 25 -kg bobsled on a track is 0.10.What force is required to push it down a 6.0^\circ incline and achieve a speed of 67 km/h at the end of 75 {\rm m}?

*September 28, 2010 by Anonymous*

**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...

*November 28, 2006 by Lisa*

**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.

*March 31, 2011 by kayt*

**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...

*February 5, 2010 by Al*

**algebra**

A. The speed of train A is 6mph slower than the speed of train B. Train A travels 220 miles in the same time it takes for train B to travel 250 miles find the speed of each train solve and check: q+9/3 + 9-4/4 = 13/3 simplify by removing factors of 1 : 7y-14/7y add: x+6/x + x/...

*November 21, 2010 by Anonymous*

**Chemistry**

In the following experiment, a coffee-cup calorimeter containing 100 \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0 \rm ^{\circ}C. If 9.80 g of \rm CaCl_2 is added to the calorimeter, what will be the final temperature of the solution in the ...

*June 17, 2012 by Ali*

**chemistry**

What quantity of heat is required to warm 53.7 g of liquid water from 0°C to 100°C?

*March 29, 2010 by rachel*

**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...

*March 27, 2007 by Paula*

**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.)

*October 18, 2010 by Mely*

**chemistry**

How much heat is required to warm 1.30 L of water from 30.0 degrees C to 100.0 degrees C? (Assume a density of 1.0 g/mL for the water.)

*October 18, 2010 by Mely*

**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.

*October 27, 2006 by Tonya*

**Science**

If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?

*March 13, 2014 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.?

*March 13, 2014 by Reggie*

**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?

*November 3, 2011 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 ...

*October 31, 2006 by mary*

**physics science**

if you wish to warm 95 kg of water by 20.0c for your bath how much heat is required

*October 30, 2011 by mary*

**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?

*April 20, 2012 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?

*April 20, 2012 by Haley*

**Physics**

A 149 kg crate is pushed at constant speed up a frictionless inclined plane of $\theta$ = 51 $^{\circ}$ with the horizontal. Assuming one pushes with a horizontal force, what is the magnitude of the force F (in N) required to do this?

*October 14, 2013 by JAYZ*

**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. ...

*February 5, 2010 by Al*

**Chemistry**

how much heat is required to warm 225 grams of water from -50c to 200 c

*November 9, 2015 by Bob *

**physics**

Vector A ⃗ {\rm \vec A} points in the negative x x direction. Vector B ⃗ {\rm \vec B} points at an angle of 35.0 ∘ ^\circ above the positive x x axis. Vector C ⃗ {\rm \vec C} has a magnitude of 19m m and points in a direction 37.0 ∘ ^\circ below ...

*September 7, 2013 by Anonymous*

**physics**

If the back of the truck is 1.5 {\rm m} above the ground and the ramp is inclined at 24{\rm ^{\circ}}, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?

*June 23, 2011 by JT*

**Chemistry Honors 10th **

How much heat is required to warm 122 g of water by 23.0 degrees Celsius?

*April 21, 2010 by Bria*

**mechanical systems**

how much heat is required to warm 1500 gallons of water from 70 to 140 degrees F?

*April 15, 2012 by Steve*

**Newtons Cooling Method**

Instructions Assume that goat milk butter melts at {85.25}^{\circ} F. On a summer day you take a stick of butter out of the refrigerator, which is set to {36.5}^{\circ} F, and put it on your front porch where the temperature is {89.5}^\circ F. (a) By Newton's Law of Cooling, ...

*September 23, 2016 by Erica*

**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

*January 24, 2011 by marie*

**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

*January 24, 2011 by marie*

**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...

*September 12, 2010 by shweta*

**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 ...

*September 12, 2010 by shweta*

**SCIENCE**

Sediment cores measured for containment levels have the highest levels of PCB's from the early 1960's. True or false I think this is true? right? Help Yes, it is true in most cases. An examp-le is shown at http://pubs.usgs.gov/circ/circ1171/html/cores.htm The reason is that ...

*May 16, 2007 by Meg*

**physics**

A plane leaves Seattle, flies 84.0{\rm mi} at 21.0^\circ north of east, and then changes direction to 52.0^\circ south of east. After flying at 120{\rm mi} in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a ...

*August 9, 2012 by Julio*

**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.

*November 15, 2012 by NeedHelp*

**Chemistry**

Water can be heated in tightly woven baskets by dropping in hot rocks. The technique is useful for cooking in the absence of metal or pottery vessels. Estimate the size (in liters) of basket needed to hold the rocks and water if 5 L of boiling-hot (100°C) water is required. ...

*September 11, 2011 by Martyna*

**Chemistry**

Water can be heated in tightly woven baskets by dropping in hot rocks. The technique is useful for cooking in the absence of metal or pottery vessels. Estimate the size (in liters) of basket needed to hold the rocks and water if 5 L of boiling-hot (100°C) water is required. ...

*September 11, 2011 by Martyna*

**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

*January 31, 2012 by Anonymous*

**physics**

how much heat is required to warm 10 grams of ice from -10 celsius to 0 celsius? (specific heat of ice= 0.5 cal/g.C?)

*March 24, 2016 by pub*

**chemistry**

A total of 2.00 \rm mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 115 g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7 ^\circ \rm C. What is the enthalpy of this reaction? Assume that...

*October 2, 2011 by Anonymous*

**Chemistry**

how much heat is required to warm a 215 g cup of water from 21 degree Celsius to 85 degree Celsius? Not sure what the formula is or how to set this up. I know the specific heat formula is heat/mass x change in temperature. Not sure if this applies to the question. Please help...

*January 26, 2015 by Clare*

**Physics**

the pressure is one atmosphere and determine the heat in joules required to produce 5.03 kg of water vapor at 100.0 °C, starting with (a) 5.03 kg of water at 100.0 °C and (b) 5.03 kg of liquid water at 0.0 °C. for part (a) I used the equation Q=mL and L was a given value but I...

*November 17, 2006 by Jena*

**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

*May 21, 2007 by jennifer lowman*

**chemistry**

What is the new volume of the balloon, where the pressure is 0.25 {\rm atm} and the temperature is -20^\circ C .

*November 2, 2010 by What is the new volume of the balloon, where the p*

**physics**

A velocity vector 33{\rm ^{\circ}} below the positive x-axis has a y-component of -14{\rm m/s} .

*August 17, 2012 by Anonymous*

**material science**

How much heat (in BTU) would be required to heat and vaporize 100 lb of water from 25°C to saturated steam at 1 atm? Assume heat capacity is constant at 1 BTU/lb-°F and the latent heat of vaporization is 1,000 BTU/lb

*January 19, 2011 by zura*

**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.

*March 29, 2009 by Pete*

**CHECK .**

Idntify the latin prefix in the word circumfrence. A. cir- B. *circ- C. circu- D. circum-

*March 31, 2010 by henry*

**chemistry**

Water can be heated in tightly woven baskets by dropping in hot rocks. The technique is useful for cooking in the absence of metal or pottery vessels. Estimate the size (in liters) of basket needed to hold the rocks and water if 5 L of boiling-hot (100°C) water is required. ...

*September 11, 2011 by HELP PLZZ! :S *