# how much heat is required to melt an ice cube that is 4.2 cm x 2.1 cm x 2.9 cm? The density of ice is 0.92 g/cm3

22,259 questions, page 54
1. ## physics

What would be the final temperature when 125g of 25 degrees Celcius water is mixed with 85g of 45 Degrees Celcius water? ( hint: Equate the heat gained by the cool water with the heat lost by the warm water.)

2. ## CHEMISTRY

A 22.2-g piece of Al (which has a molar heat capacity of 24.03 J/mol°C) is heated to 84.6°C and dropped into a calorimeter containing water (the specific heat capacity of water is 4.18 J/g°C) initially at 23.5°C. The final temperature of the water is

asked by Sarah on May 1, 2012
3. ## abiapoly heat energy

500g of copper is heated from 30 degree celcius to 120 degree celcius what is the quantity of heat supplied b.if the same quantity of heat is supplied to 300g of water initial at 30degree what will be the final temperature?

asked by sandra on March 22, 2015
4. ## chem

Potassium nitrate has a lattice energy of -163.8 kcal/ mol and a heat of hydration of -155.5 kcal/ mol . How much potassium nitrate has to dissolve in water to absorb 105kj of heat? Answer in kg.

asked by michelle on September 19, 2012
5. ## Chemistry

How many grams of water can be cooled from 31 C to 20 C by the evaporation of 37 grams of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g. The specific heat of water is 4.18 J/g*K.

asked by Anonymous on February 11, 2010
6. ## chemistry

The specific heat of ethanol is 0.59 cal/g Celsius If one adds 450 cal of heat to 37 g of ethanol at 20 celsius what would the final temp be

asked by Anonymous on March 16, 2014
7. ## physics/chem

what is the relationship between density and specific heat capacity? and why? i thought when density increase specific heat increase but it says that it is inversely proportional. thank you

asked by lizzy on December 1, 2010
8. ## Chem 2 enthalpy

How much heat is evolved when 25.5 g of benzene freezes at 5.5 Celcius (molar heat of fusion is 9.94 kJ/mol and molar mass of benzene= 78.0 g/mol)

asked by Anonymous on August 26, 2010
9. ## Chemistry

How many grams of Fe can be heated from 40.0oC to 60.0oC when 20.0 g of Cu cools from 100.0oC to 25.0oC? Specific heat of Fe = 0.444 J/(g oC); specific heat of Cu = 0.382 J/(g oC)

asked by Mindy on July 21, 2015
10. ## chemistry

Potassium perchlorate has a lattice energy of -599 kj/mol and a heat of hydration of -548 kj/mol. Find the heat of solution for potassium perchlorate when 10.6 g of potassium perchlorate is dissolved with enough water to make 102.7 ml of solution.

asked by ella on September 18, 2009
11. ## Chemistry

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

asked by Justin on November 8, 2015
12. ## Chemistry

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

asked by Justin on November 8, 2015
13. ## Chemistry

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

asked by Justin on November 8, 2015
14. ## Chemistry 1

Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 215 cal/g. The scientist observing the

asked by Molly on January 24, 2014
15. ## general law

Dr. Bob applies for medical staff privileges at General Hospital. The hospital administrator? A. is not required to look into Dr. Bob’s background. B. is required to query the National Practitioner Data Bank. C. is required to query the Data Bank unless

asked by kristin on January 25, 2011
16. ## law

Dr. Bob applies for medical staff privileges at General Hospital. The hospital administrator? A. is not required to look into Dr. Bob’s background. B. is required to query the National Practitioner Data Bank. C. is required to query the Data Bank unless

asked by kristin on January 25, 2011
17. ## physics

Estimate the rise in temperature of the brake discs in a car of mass 1200g,travelling at 30m/s which is brought to rest by the application of the brakes alone,the brake disc have a total mass of 5kg.Assummed that there is no heat loss and that the material

asked by BRIGHT on February 13, 2012
18. ## Chem

In a coffee cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield the following reaction: Ag+ (aq) + Cl- (aq) -----------------> AgCl (s) The two solutions were initially at 22.60 °C, and the final temperature is 23.40

asked by Joe on November 2, 2011
19. ## Physics

A 95 gram piece of metal is heated to 98°C and placed into 200mL of water insulated at 20°C. If the equilibrium temperature is 27.20, find: The heat gained by the water. calories: _________ The specific heat of the metal. cal/(g°C): ________ Hint: 1 mL

asked by Anna on July 9, 2016
20. ## science

explain why a substancew with a network structure has a high melting point ? High is a relative term. What is high? coudnt u give me a better response Think what holds a network together? Bonds? Bonds must be broken to melt a solid. thank u

asked by vanessa on March 4, 2007
21. ## physics

Part C Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 21 degrees. If the edge of the roof is 11.0 above ground, what is the speed of the snow when it hits the

asked by Anne on October 15, 2010
22. ## math

You flip a coin and roll a number cube. What is the probability of getting a head and a moltiple of three? a 1/12 b 1/6 c 1/4 d 3/2 please explain !!!

asked by Anonymous on March 21, 2009
23. ## chemistry

what volume of water at 4 degrees Celsius can be held in a cube whose edge is 3.0cm long?

asked by the yavull on February 1, 2011
24. ## math

A cylinder tank has a capacity of 3080cm cube. If its depth is 20cm, find its diameter.

asked by shashank mishra on March 5, 2017
25. ## Geometry

Find the length of d in simplest radical form of he diagonal of a cube with sides of s units.

asked by helen on March 14, 2012
26. ## Math

Solve (log base 2, cube root of 2) log2(2^1/3) You transform it into the form above, right? then you cancel the 2s to get 1/3

asked by Nemo on September 29, 2011
27. ## Math (PROBABILITY)

Elizabeth wants to use a standard number cube to do a simulation for a scenario that involves three equal outcomes. What is one way in which she can do this?

asked by Gabby on December 3, 2017
28. ## Algebra

If the volume of a cube is 343x^12, what is its side length. I’m trying to find out how to set the formula up, not for answers. Thank you!

asked by Bob Ross on January 9, 2018
29. ## Algebra, 8th Grade mathematics

I need help on this question. My aunt doesn't understand it so can you help me? 1+3+3^2+3^3+3^4+••••••+3^250=? The "^" is for Square, cube and ect. It also includes X= 3^?-1 Can you help me please?

asked by Anonymous on November 19, 2016
30. ## math

a patient has 8.5ml of blood drwan for testing. Convert this measurement into inches cube

asked by kisha on September 4, 2012
31. ## maths

Volume of prism 1296 cube cm height 16/√3cm find whole surface area.

asked by anita on January 19, 2015
32. ## physics

find the mass of the moon if its radius is 1.76*1000000 m and the average density is 4*1000kg/m cube

asked by megha on May 26, 2011
33. ## geometry

The legs of a right triangle measure 3x 8. A cube has edge lengths and 15. If the hypotenuse measures of 6 inches. What is the 3x+3, what is the value of x?

asked by stacy on January 23, 2012
34. ## Math

Use the formulas V=s❸ andA=6s❷ to calculate the volume and surface area of the cube That is 2.5 in. on each side.

asked by mikil on August 12, 2013
35. ## - Physical Education

Calculate the density in SI units of a solid cube that measures 5 cm on each side and has a mass of 350 g.

asked by meera on September 30, 2010
36. ## Pre-algebra

a coin is tossed and a number cube is rolled. What is the probability of tossing heads and rolling a 3 or a 5

asked by Laterra on September 2, 2016
37. ## math

Graph two equations to determine every real number whose square equals its cube. I am so confused!

asked by Cindy on February 1, 2016
38. ## Math

suppose you have two prisms with the same volume. one is shaped like a cube and the other is "longer." which has the lesser surface area?

asked by Elizabeth on April 9, 2016
39. ## Algebra

I need help with these Algebra problems in which I need to give the square and the cube of each expression in simplified form. 1. -2t^2k 2. 3rs^4 3. 5m^3n 4. -4x^2y^2

asked by Drew on March 28, 2017
40. ## pre algebra

find the volume of each solid. if necessary round to the nearest tenth. cube: side 8.5inches

asked by lavena on June 16, 2010
41. ## chemistry

A certain mass of gas occupied 450cm cube at 25°c.At what temperature will it have it's volume reduced half

asked by violet on January 17, 2016
42. ## math

a coin is tossed twice and a number cube is rolled. Find probability. 1 head, 1 tail,and 3

asked by Lena on September 7, 2010
43. ## last algebra question

P((1 + r)^2)^3 To simplify this expression would I distribute first or square the parentheses and tehn cube the numbers in the parenthesis?

asked by Shawn H. on September 17, 2007
44. ## math

give expressions in the variable n, n ≥ 3 for the number of sugar cubes in the n*n*n cube with 0,1,2, or 3 painted faces, respectively

asked by Amber on August 30, 2011
45. ## Chem.

What is the mass (in kilograms) of a cube of silver that measures 0.68 on each side, when the density of the sample is 10.5g/cm3

asked by nick on January 20, 2013
46. ## calculus

the edges of a cube are increasing at the rate of 5 in/min. How fast is the volume changing when each side is 4 in.

asked by dalton on November 4, 2012
47. ## Physical Science

can I get some help with these questions. im not sure on these ones During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, a. both the intake and exhaust valves are open b. the

asked by cali on February 16, 2014
48. ## Physics - repost to MathMate or whoever can help

A 10-kg iron ball is dropped onto a pavement from a height of 100 m. Suppose half of the heat generated goes into warming the ball. Show that the temperature increase of the ball is 1.1oC. (In SI units, the specific heat capacity of iron is 450 kJ/kg*oC.)

asked by Ceres on September 24, 2009
49. ## MATH PLZ HELP

4) A number cube with the numbers 1 through 6 is rolled. Find the probability of rolling a number greater than 5. A. 1/6*** B. 1/3 C. 1/4 D. 2/3 An number cube is rolled 360 times and the results are recorded as follows:61 ones 26 twos 36 threes 76 fours

asked by Alexia Marsel on May 23, 2016
50. ## physics

Lake Champlain, bordered by New York, Vermont, and Quebec, has a surface area of 1,126 km^2. If the energy (173 PJ) is provided by sunlight shining on the lake at an average rate of 200 W/m^2 but with only half that amount absorbed, how long will it take

asked by Joseph on February 9, 2017
51. ## science

Calculate the Molar Enthalpy of Neutralization (ÄHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 5.30°C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00

asked by brittany sheats on November 17, 2013
52. ## chemistry

A 115 g piece of metal, initially at 60.0 °C, is submerged into 100.0 g of water at 25.0 °C. At thermal equilibrium, this mixture had a final temperature of 27.0 °C. The specific heat capacity of water is 4.18 (J/g°C). Use this information to determine

asked by Brandi on March 1, 2013
53. ## Chemistry (How do I calculate)

Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 6.92°C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00

asked by Ashley on June 28, 2013
54. ## Chem

The following substances undergo complete combustion in a bomb calorimeter. The calorimeter assembly has a heat capacity of 5.136 ^ C. In each case, what is the final temperature if the initial water temperature is 22.37^ C? 0.3268g caffeine, C8H10N4 (heat

asked by Alex on October 29, 2012
55. ## physics

A one mole sample of an ideal monatomic gas at 400 K undergoes an isovolumetric process acquring 550 J of energy by heat. Next it undergoes an isobaric process during which is loses the same amount of energy by heat. Find the work done on the gas. Assume

asked by Anonymous on June 16, 2016
56. ## science

if the specifc heat of iron = 0.46J/g C,how much heat is needed to warm 50g of iron from 20C to 100C -- I do not know how to make the celcius o above the temperature number my anwswer Q = Mx(delta)TxC Q=50gx80Cx0.46J/gC Q = 1840 Joules Delta = the triangle

asked by sam on April 25, 2008
57. ## College Chemistry

a) Water drops, sitting on your skin after a dip in a swimming pool, evaporate. Identify the system and its surroundings for the above process and state the direction of heat transfer. Is the process endothermic or exothermic. Would the system be the

asked by Molly :) on March 30, 2010
58. ## Chemistry

In an aluminum calorimeter, 25.00 g of I2 was burned in excess H2 to form HI. From the data below, establish the molar heat of reaction and write a thermochemical reaction. Data: Mass I2 25.00 g Mass Al 70.00 g Specific heat Al 0.900 J/gC Volume water

asked by Anonymous on January 14, 2018
59. ## Chemistry

Consider the reaction: 2HCl(aq) + Ba(OH)2(aq) → BaCl2(aq) + 2H2O(l) ∆H = - 118 kJ Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.50 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25 oC and the

asked by Nisah on September 16, 2012
60. ## earth

Atmosphere Homework! 1.Which of the following layers of the atmosphere is closest to space? 2.A barometer measures? 3. The atmosphere contains tiny solid particles called what? 4.The process by which the atmosphere slows Earth's loss of heat to space is

asked by Kelly on May 5, 2011
61. ## chemistry

When 40.0 mL of 1.00 M H2SO4 is added to 80.0 mL of 1.00 M NaOH at 20.00°C in a coffee cup calorimeter, the temperature of the aqueous solution increases to 29.20°C. If the mass of the solution is 120.0 g and the specific heat of the calorimeter and

asked by kamal on June 23, 2014
62. ## Chemistry

350 calories of heat is added to a sample of nitrogen gas, and the temperature is increased by 89 degrees celsius. what is the mass of the sample of nitrogen gas? For this we'll presume that you are either given, or can find the specific heat of Nitrogen

asked by Allie on October 31, 2006
63. ## chemistry

How much energy (in kilojoules) is released when 12.3g of steam at 121.5degree C is condensed to give liquid water at 64.5 degree C? The heat of vaporization of liquid water is 40.67 kj/mol, and the molar heat capacity is 75.3 J/(K mol) for the liquid and

asked by Lauren on January 25, 2010
64. ## chemistry

1. Heat can initiate reaction as well as be a product of chemical reactions. Cite the specific sample from the experiment that show heat acting in the manner 2. Aluminum chloride was a product in step 6. How could you instruct your lab partner to recover

asked by jhong on March 4, 2012
65. ## PHYSICS 1 ..'''''''''''''''''''''''' helllpppppppp

A girl of mass (Mg) is standing on a plank of mass (Mp). Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity (vgp) to the right relative to the plank.

asked by Rrjey on February 26, 2013
66. ## AP Physics

A student found an unknown substance. In an effort to identify the thermal properties of the substance, she isolated a specimen of 47 gram, and applied 290 J of heat energy to the specimen. If she measured the temperature of the specimen changed from 20 °

asked by Sasami on December 2, 2009
67. ## Chemistry 2

Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 107 kJ of heat?

68. ## Chemistry

A piece of Copper alloy with a mass of 89.0 g is heated at 30.0 degrees C to 50.0 degrees C. In the process, it absorbs 517 J of energy as heat. What is the specific heat of this copper alloy? and Please do a step by step, I really want to see where I keep

asked by Anonymous on January 16, 2012
69. ## Chemistry

Calories of heat absorbed by water = (Mass undergoing change)(Change in temp.)How much heat is needed to warm 125 g. of water from 25 degrees Celsius to 100 degrees Celsius. Thank you very much!

asked by Larissa Jenkinson III on January 30, 2013
70. ## chemistry

Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 114 kj of heat?

asked by reese on February 15, 2009
71. ## chemistry help!

Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 105 kJ of heat?

asked by student on September 19, 2012
72. ## Chemistry - General

1. Consider a calorimeter into which 135g of water at 45.3 degrees Celsius is added. The initial temperature of the calorimeter was 23.8C and the equilibrium temperature of the water and the calorimeter is 39.6C. Assuming there is no heat loss to the

asked by Sahar on July 24, 2009
73. ## Chem

Could someone explains reaction heat and Entropy and Free Entropy to me. And can you please give an example of each. Thanks Much! ;) Since this is not my area of expertise, I searched Google under the key words "heat entropy free" to get these possible

asked by Hello Kit on March 19, 2007
74. ## Thermochemistry Ap Chem homework

Any help would be great, even if it is just a way to start or a formula. Calculate the heat necessary to convert 10.0 g of water (just melted) at 0 degrees Celcius to water at 20 degrees Celcius, assuming that the specific heat remains constant at 1

asked by Chris on November 15, 2010
75. ## physics- response to bobpursley

which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and

asked by matt on June 24, 2009
76. ## Science(Magnets)

Should be easy, this. The two south pole ends of two magnets are touching. Which of the following can be concluded? A. No work was required by an outside force. B. The magnets are naturally attracted to each other. C. Work was required by an outside force.

asked by dddd47906 on September 20, 2014
77. ## chemistry

a 12.0g of sample A (70.2g/mol)was burned in a bomb calorimeter in an excess of O2(g). A+2 O2(g)---> 2 CO2(g) +2 H2O(l) The temperature of the calorimeter rose from 25.00 degrees celisus to 29.82 degree celisus. ifthe heat capacity of the calorimeter and

asked by evelyn on November 19, 2012
78. ## Physics (Heat Engines)

21. A heat engine operates in a cycle between temperatures 700 K and 400 K. The heat input to the engine during each cycle is 2800 J. What is the maximum possible work done by the engine in each cycle? (A) 1200 J (B) 1600 J (C) 2100 J (D) 2800 J (E) 4400 J

asked by Kate on March 6, 2010
79. ## Chem!!

Consider the dissolution of CaCl2: CaCl2(s) -----------> Ca2+(aq) + 2Cl-(aq) ΔH=-81.5 kJ/mol An 11.0 gram sample of CaCl2 is dissolved in 125 g water with both substances at 25.0 °C. Calculate the final temperature of the solution assuming the solution

asked by Bob on November 2, 2011
80. ## Biology

How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid

asked by Kylie on February 9, 2016
81. ## ap chemistry

Propane (C3H8) is burned in oxygen to pro- duce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are reacted with 10.0 mol O2? 1. 4024 kJ 2. 2012 kJ 3. 916 kJ 4. 1555 kJ 5. 5122 kJ

asked by cheri on October 31, 2012
82. ## Chemistry

I am working a question...... I am not sure how to go about solving this or working it out. The class is online. Can some explain how to go about doing this. Thank you greatly :) How much heat does your body lose when 2.60g of sweat evaporates from your

asked by STAT on March 21, 2013
83. ## Physics

please check these: In which of the following sentences is WORK used in the scientific sense of the word? a. holding a heavy box requires a lot of work b. a scientist works on an experiment in the laboratory c. sam and rachel pushed hard, but they could do

asked by y912f on February 9, 2009
84. ## physics

In lab you submerge 100 g of 41 degree Celcius iron nails in 100 g of 25 degree Celcius water (the specific heat of iron is 0.12 cal/g degrees Celcius) A)Equate the heat gained by the water to the heat lost by the nails and find the final temperature of

asked by christy on April 3, 2012
85. ## American Goverment

The 1964 Civil Rights Act (Points : 1) required localities to bus students in order to end racial segregation. overturned the 1921 anti-boycotting law. ended racial segregation in schools, at the workplace, and by “public accommodations.” required

asked by christopher on May 24, 2015
86. ## Physics

A steam engine's boiler completely converts 155 kg of water to steam. This process involves the transfer of 3.5 x 10^8 J by heat. If steam escaping a safety valve does 1.76 x 10^8 J of work against the outside atmosphere, what is the net internal energy of

asked by Lindsay on March 26, 2008
87. ## Chemistry

A particular natural gas consists, in mole percents, of 83.0% CH4, 11.2% C2H6, and 5.8% C3H8. A 385L sample of this gas is measured at 25C and 729mmHg, and is burned in an excess of oxygen. How much heat in kJ is involved in this reaction. I assume you use

asked by Alex on March 19, 2019
88. ## chem

Predict the direction of the net reaction in each of the following system, as a result of increasing the temperature. Delta H is an indicator or whether the reaction releases heat delta H(-), or heat is absorb delta H(+). Write where the direction shifts.

asked by Angel Locsin on November 28, 2012
89. ## Chemistry

what do limiting reagents have to do with... 5F2(g) + 2NH3(g) ==> N2F4(g) + 6HF(g) a)If you have 66.6 g NH3, how many grams of F2 are required for complete reaction? b)How many grams of NH3 are required to produce 4.65g HF? c)How many grams of N2F4 can be

asked by Keith on April 5, 2010
90. ## Physical

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.385 J/g•°C x 22°C B. Q = 0.75 g x 0.385 J/g•°C

asked by Anonymous on March 25, 2016
91. ## Physics

A liter of water is used to cool some electronics. If 1000 J of heat is given off by the electronics, by what temperature does the water increase? One liter of water has a mass of 1 kg and a specific heat of 4.184 J/(g °C). I can not get this..please help

asked by Sean on April 26, 2015
92. ## chemistry

What is the change in internal energy (in J) of a system that absorbs 0.246 kJ of heat from its surroundings and has 0.771 kcal of work done on it? Is this correct? 0.246, kJ x (1000 J/1 kJ) = 246 J 0.771 kcal x (4184 J/1 kcal) =3225.86 j 246 J + 3225.86 J

asked by patrick on October 14, 2015
93. ## chemistry

How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792

asked by Brittany on December 8, 2010
94. ## Chem URGENT

How much energy (in kilojoules) is released when 13.3g of steam at 114.5∘C is condensed to give liquid water at 67.0∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6

asked by Jess on June 17, 2014
95. ## Chemistry

How much energy (in kilojoules) is released when 12.8 g of steam at 130.0 C is condensed to give liquid water at 73.5 C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K*Mol)for the liquid and 33.6

asked by Kevin on January 24, 2011
96. ## Chemistry

How much energy (in kilojoules) is released when 15.2g of steam at 114.5∘C is condensed to give liquid water at 63.5∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6

asked by David on January 21, 2015
97. ## Chem 1LB

When 0.678 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 11.0C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to

asked by Libit on February 21, 2010
98. ## chemistry

When 0.712 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 116C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

asked by wilson on May 18, 2009
99. ## Chem 1LB

When 0.678 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 11.0C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to

asked by Libit on February 21, 2010
100. ## Science Ms. Sue?

Why did the following change occur? The snow that covered the ground all winter began to melt, temperatures rose, and flowers started to bloom. A. days became shorter B. the Earth tilted away from the sun C. the sun's rays became more concentrated D. Earth

asked by Amy on January 15, 2015