# when 35.0ml of 1.43 M NaOH at 22.0 degree celcius is neutralized by 35.0 ml of HCl also at 22.0 degree celcius in a coffee-cup calorimeter, the temperature of the final solution rises to 32.29 degree celcius

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1) Nova, whose mass is 50.0 kg, stays out skiing for too long and her body temperature drops by 2.00 degree celsius . What is the amount of heat lost from Nova's body? (cHuman body= 3470 J/kg degre celcius) 2) Phoebe's insulated foam cup is filled with 0.150 kg of the coffee (...

### chemistry

100g of stea initial at 100 degree celcius is passed through a calorimeter containing 1kg of water at 20 degree celcius. Assuming no heat loose and negligible heat capacity of the calorimeter, calculate the final temperature of the calorimeter and the content. heat of ...

### Physics

120 grams of metal at 88 degree celcius is poured into a 70 grams isolated cup contains 250 grams of water at 16 degree celcius. The final temperature of the mixture is 17.5 degree celcius. Determine the specific heat capacity of the metal?

### college physics

calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.

### college physics

calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.

### Heat Energy

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

### ap chemistry

A sample of KOH is dissolved into 100.0 grams of water in a coffee cup calorimeter. if the dissolution produces 6.45 kJ of heat and the temperature change is 25.4 degrees celcius to 40.0 degrees celcius, how much KOH (in grams) is added to the water? (the specific heat of the ...

### Physics

The ice point of a faulty mercury in glass thermometer isX degree celcius while its steam point is 85 degree celcius. If the thermometer reads 50 degree celcius when the true temperature is 40 degree celcius, calculate the value of X

### chemistry

Can anyone help me with these Chemistry questions? I am trying to study for an upcoming test and its just not sinking in as well and I thought. This is Thermochem for a heads up: Suppose 33mL of 1.20M HCl is added to 42mL of a solution containing excess sodium hydroxide in a ...

### Chemistry

The specific heat capacity of a metal is given as 0.745 J/ degree Celcius.What mass of the metal must be heated to 95 degree Celcius in order to be used to warm 2.548 L of water from 18.1 degree Celcius to 22.5 degree Celcius ? I'm so confused I don't even know where to start ...

### Heat energy

CORRECTION (a). 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 30 degree celcius. What will be the final temperature.

### Physics

A closed inexpansible vessel contains air saturated with water vapour at 77 degree Celcius. The total pressure of the vessel is 1007mmHg. Calculate the new pressure if the temperature is reduced to 27 degree celcius. (svp water at 77 degree celcius and 27 degree celcius ...

### chemistry

in one experient, a student placed 50.0ml of 1.00molar Hcl at 25.5celsius in a coffee-cup calorimeter. to this was added 50.0ml of 1.00molar NaoH solution also at 25.5celsius. the mixture was stirred, and the temperature quickly increase to a maximum of 32.2 celsius. what is ...

### chemistry

In the following experiment, a coffee-cup calorimeter containing 100ml of H2O is used. The initial temperature of the calorimeter is 23 degrees celcius. If 7.20g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The ...

### Chemistry

Substance A has a melting point of -10 degree celcius and a boiling point of 57 degree celcius. Sunstance B has a melting point of -67 degree celius and a boiling point of 15 degree celius. Room temperature is 20 degree celcius. (A) What is the physical state of substance A at...

### 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.

### Physics

A piece of copper ball of mass 20 gram at 200 degree celcius is place in a copper calorimeter of mass 60 gram containing 50 grm of water at 30 degree celcius, ignoring heat loses calculate the final steady temperature of the mixture. ( S. H. C of water is 4200j/kgk )

### chemistry

When 50.0mL of 1.20 M of HCl (aq)is combined with 50.0mL of 1.30 M of NaOH (aq) in a coffee-cup calorimeter, the temperature of the solution increases by 8.01 Degrees C. What is the change in enthalpy for this balanced reaction? HCl(aq) + NaOH(aq) --yields-- NaCl(aq) + H20(l) ...

### Chemistry

When 35.0 mL of 1.43 M NaOH at 22.0 degres Celsius is neutralized by 35.0 mL of HCL also at 22.0 degrees Celsius in a coffee-cup calorimeter, the temperature of the final solution rises to 31.29 degrees Celsius. Assume that the specific heat of all solutions i 4.18 J/ g* C, ...

### chemistry

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units...

### Chemistry

Please let me know how I am doing with the following three chemistry questions. 1.A sample of a gas in thermometer has a volume of 135mL at 11 degree celcius.Indicat what temperature(in k and degree celcius)would correspond to the foll.volume: (a)volume:113mL temperature ?? ...

### physics

120 grams of an unknown metal at a temperature of 95 degrees celcuius is poured into 140 grams of aluminum calorimeter containing 220 grams of water. If the inital temperature of the water and calorimeter was 15 degree celcuius and the final temperature was 18 celcius, find ...

### Science

An alumium rod when measured with a steel scale both being at 25 degree celcius appears to be 1 meter long. If the scale is correct at 0 degree celcius, what is the true length of the rod at 25 degree celcius? What wull be the length of rod at 0 degree celcius?

### Chemistry

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units...

### Physics

A faulty celcius thermometer read 0.7 degree celcius at the melting point of pure ice and 99.5 at the boiling point of water at normal pressure. Calculate the correct temperature when it reads 30 degree celcius. At what temperature will its reading be exactly correct

### 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 the water. B)Your lab ...

### Chemistry

A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the ...

### Chemistry

A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the ...

### ap chemistry

a cubic piece of uranium metal (specific eat capacity= .117 J/g degree celcius) at 200.0 degrees celcius is droped into 1.00 L of deuterium oxide ("heavy water", specific heat capacity=4.211 J/g degree celcius) at 25.5 degrees celcius. the final temperature of the uranium and ...

### Chemistry

HCl(aq) +NaOH(aq) ---> NaCl +H2O In a coffee cup calorimeter 50 ml of 2.00M HCl was combined with 50ml of 2.05M NaOH. a) What is the enthalpy change for the reaction? b) What is the molar enthalpy for the reaction? Given: Change in T= 14 degrees celsius heat capacity of the...

### Chemistry-Dr.Bob

You can mix 100.mL of 1.0 M HCl with 100 mL of 1.0 NaOH, both at 25 degree Celcius. The temperature of your calorimeter rises by 5.98 degree C, and its heat capacity is 100 J/degre C. How much energy is released per mol of H2O formed? My answer: 6x10^6 J per mol H2O

### chemistry

You mix 50.0 ml of 2.0 M HCl and 50.0 ml of 2.0M NaOH. The temperature of the resulting solution increases from 22.5 degrees celcius to 32.3 degrees celcius. What is the q of the calorimeter

### physics heat flow problems.

b. Two metallic rods A and B with similar length and cross sectional area are joined together and all curved surfaces are insulated. At steady state, the temperatures at their ends are shown in the figure below. The thermal conductivity of A is twice that of B. Calculate the ...

### science

in shell and tube type of condenser, the flue gas mixture of acetaldehyde,oxygen and nitrogen at 17391.17Kg/hr enters to the condenser at 75 degree celcius and leaves at 20 degree celcius,while the cooling water enters at 17 degree celcius and leaves at 37 degree celcius....

### industrial process

if 100 grams of water is at 100 degree celcius are poured into 100 grams turpentine at 9 degree celcius and the resulting temperature found to be 70 degree celcius. what is the specific heat of the turpentine?

### Chemistry

Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no heat lost to calorimeter...

### Chemistry 109

How many joules of heat are required to raise the temperature of 225 g of water from 42 degree celcius to 75 degree celcius?

### Science

What is the approximate temperature of the solution after 1.75 if it is 19 degree celcius at 1.5 and 24 degree celcius at 2.0 minute? Can anyone say how to do it exactly?

### Science

A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The other has a mass of ...

### Science

A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The other has a mass of ...

### Physics 11th Grade "HEAT' 2

1) Emily is testing her baby's bath water and finds that is too cold,so she adds some hot water from kettle on the stove. If Emily adds 2.00 kg of water at 80.0 degree celcius to 20.0 kg of bath water at 27.0 degree celcius , what is the final temperature of the bath water? 2...

### Physics

what is the final temperature of mixture, if 100gm of ice at 0 degree celcius into 100gm of water at 20 degree celcius in an iron vessel of mass 100gm.(specific heat of iron=0.1)

### science

Assuming that radiation with a wavelength = 15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 degree celcius, how many photons are necessary to raise the temperature of a 350 mL cup of ...

### chemisrty

A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of ...

### chemistry

assuming that the calorimeter contains 5.00 * 100 g of water and that the initial temperature is 30.0 degree celcius. what will the final temperature be? (use the proper formula and units, and show your work below)

### chemistry

The reaction of hydrochloric acid and sodium hydroxide is exothermic HCl +NaOH --> NaCl + H2O In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5 oC in a coffee cup calorimeter. To this was added 50.0 mL of 1.00 M NaOH solution, also at 25.5 oC. The mixture ...

### chemistry

The reaction of hydrochloric acid and sodium hydroxide is exothermic HCl +NaOH --> NaCl + H2O In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5 oC in a coffee cup calorimeter. To this was added 50.0 mL of 1.00 M NaOH solution, also at 25.5 oC. The mixture ...

### Chemistry

a coffee cup calorimeter normally consists of two nested styrofoam cups with a lid. a coffee cup calorimeter of this type contains 125.0 g of water at 20.00 degrees C. A 120.0 g sample of copper metal is heated to 98.0 degrees C by putting it into a beaker of hot water. The ...

If 100g of zinc (c=377J/kg degrees celcius) at 95 degrees celcius is dropped into 60g of water contained in a 100g calorimeter (c=419J/kg degrees celcius) at 20 degrees celcius, what will the final temperature be?

### math

The temperatures in degree celcius at midnight on 10 consecutive days were 4,1,3,0,-2,-1,-5,-3,1,-2. How many of these temperatures are within 2.2 degree celcius of 1 degree celcius?

### chemistry

determine the solubility in g/100 g water of A. KNO3 at 90DEGREE CELCIUS B. KBr at 80 degrees celcius C. Kl at 0degree celcius D. KCl at 40 DEGREE CELCIUS

### 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?

### Heat Energy

A container holds 3kg of water at 25 degree celcius. If 0.5kg of iron at 80 degree celcius is added to the water in the contain. What is the? (i) final temperature of the container. (ii) Quantity of heat gained by water

### chemistry HELP

A 46.2 gram sample of copper is heated to 95.4 degrees celcius and then place into a calorimeter containing 75.0 grams of water at 19.6 degrees celcius. The final temp of the water and copper is 21.8 degrees celcius. Calculate the specific heat capacity of copper, assuming all...

### Chemsitry II

50.00 mL of 1.0 M HCl and 50.00 mL of 1.0 M NaOH are mixed. The temperature is observed to increase by 10.0 degrees C. How much energy (in J) was absorbed by the calorimeter? Assume a density of the reaction mixture of 1 g/mL. Specific heat of the solution is 5.00 J/g/degree C...

### science

What is the final temperature when you mix 40ml of 40degree celcius water and 25ml of 20 degree celcius water?

### thermo

four hundred cubic centimeters of a gas at 740mm Hg absolute and 18 degree celcius a process until the pressure until the pressure becomes 760mm Hg absolute and the temperature o degree celcius. what is the final volume of the gas

### physics

a cylinder of diameter 1cm at 30degree celcius is to slid into a hole on a steel plate. the hole has a diameter of 0.9997 cm at 30 degree celcius. to what temperature must be the plate be heated when steel has the alpha 1.1X10^-5/degree celcius

### chemistry

What is the energy released when steam at 25 g of steam at 10 degree celcius is cooled to ice at-10 degree celcius work heat change for the following changes calculated 150 degree Celsius steam --150 degree water 150 degree water to 0 degree water 100 degreewater-- 0 degree ...

### physics

a room with floor measurement 7m by 10m contains air of mass 750kg at a temperature of 34 degree celcius. the air is cold untill the temperature falls to 24 degree celcius. calculate the hight of the room

### chemistry

50.00 mL of 1.0 M HCl and 50.00 mL of 1.0 M NaOH are mixed. The temperature is observed to increase by 10.0 degrees C. How much energy (in J) was absorbed by the calorimeter? Assume a density of the reaction mixture of 1 g/mL. Specific heat of the solution is 5.00 J/g/degree C...

### AP Chemistry

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

### AP Chemistry

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

### chemistry

What is the heat evolved of oxalic acid if the temperature change initial is 28 degrees celcius and the final is 29 degrees celcius and the change in temperature is 1 degree celcius,what is the heat capacity of axolic acid

### Heat & Properties of Matter

A platinum resistance thermometer has a resistance of 10.59ohms at 0 degree celcius and 15.59ohms at 100 degree celcius. Assuming that the resistance changes uniformly with temperature, what is: (i) the temperature when the resistance is 10.59ohms? (ii) the resistance of the ...

### Heat & Properties of Matter

A platinum resistance thermometer has a resistance of 10.59ohms at 0 degree celcius and 15.59ohms at 100 degree celcius. Assuming that the resistance changes uniformly with temperature, what is: (i) the temperature when the resistance is 10.59ohms? (ii) the resistance of the ...

### chemistry

125 mL of 25 dergree celsius of distilled water was used to wash and transfer a precipitate. rather than 20 ml of CHILLED distilled water (at 4 degree celcius). the solubility of baruim iodate monohydrate in 25 degree celcius water is 0.028g per 100 ml of water; in 4 degree ...

### physics

A metal wire has a resistance of 8 ohm at a temperature of 20 degree celcius . If the same wire has a resistance of 8.40 ohm at 70 degree celcius , what is the resistance of this wire in ohms when its temperature is -10 degree celcius ?

### physics

A metal wire has a resistance of 8 ohm at a temperature of 20 degree celcius . If the same wire has a resistance of 8.40 ohm at 70 degree celcius , what is the resistance of this wire in ohms when its temperature is -10 degree celcius ?

### MAC1045

What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 mL sample of 0.250 M HCl(aq) is added to a 50.00 mL sample of 0.250 NaOH(aq). The initial temperature is 19.50 degrees C and the

### chemistry

Q.1Explain why CH3COOH2^+ is in terms of protonic concept? Q.2 0.1 mole HCl is dissolved in distilled water of volume V then at a limit V =infinite pH of the solution is equal to______? Q.3One litre of water contains 10^-5 moles of H^+ ions at 25 degree Celcius.Degree of ...

### Physics

You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 40 degrees celcius?

### Physics

You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

### Physics

You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

### PHYSICS

You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

### Physics

You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

### Physics

You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

### chem211

A chemistry professor has a cup of coffee containing 50.0mL of room temperature coffee at 25.0C. The professor also has a new pot of hot coffee at temperature of 96.0C. What volume of hot coffee will the professor need to add to his cold coffee to reach the ideal drinking ...

### science

350g ofwater at 30 degree celcius is contained in a copper vessel of mass 50g. Calculate the mass of ice required to bring down the temperature of the vessel and its content at 5 degree celcius.

### 9

In an closed vessel 300 torr of argon gas is filled and the vessel heated to 925 degree celcius from room temperature. What will be the pressure at 925 degree celcius .

### chemistry

In a coffee cup calorimeter, 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH are mixed to yield the following reaction: HCl + NaOH  NaCl + H2O. The two solutions were initially at 22.1 oC and the final temperature is 24.2 oC. Calculate the heat that accompanies this ...

### chemistry

you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water at 0 degree celsius,you want to combine both raise the temperature to 100 degree celcius but boil off only 50 ml to gas phase keep the rest as liquid....

### physics

A copper of mass 400g is heated until it's temperature becomes 250 degree celcius.it is dropped into water weighing 200g at 50 degree celcius.calculate the mass of water vapour produced.

### Chemistry

A 10.00 mL aliquot of 0.100 M NaOH is added to 15.00 mL of 0.100M HCl in a coffee cup calorimeter. The initial temperature of the two dilute liquids were both 25.0 degrees C and the final temperature of the mixture was found to be 37.8 degrees C. What is the (molar) heat of ...

### chemistry

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units...

### Chemistry

500.0mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200mol/L NaOH(aq).Both solutions had a density of 1.000g/mL & a specific heat of 4.184 J/g.K. The calorimeter had a heat capacity of 850.0 J/degree C. The temperature of ...

### chemistry

the vapour pressure of water at 20 degree celcius is 18 mm hg .if the relative humidity is 35 % the weight per litre of air at 20 degree celcius is ?

### chemistry

10mL of 0.500M HCl was added to 50mL of 0.100M NaOH in a coffee cup calorimeter, and the temperature increased from 22.3°C to 23.1°C. What is the experimentally determined enthalpy of neutralization of HCl (in kJ/mol)? The specific heat of water is 4.184J/g•°C, and the ...

### 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...

### 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...

### Chemistry-DrBob222

A 10.00 mL aliquot of 0.100 M NaOH is added to 15.00 mL of 0.100M HCl in a coffee cup calorimeter. The initial temperature of the two dilute liquids were both 25.0 degrees C and the final temperature of the mixture was found to be 37.8 degrees C. What is the (molar) heat of ...

### Chemistry

How much heat is required to vaporize 1.00 L of CCl4 at its normal boiling point? The following data are given for CCl4. Normal melting point, -23 degree celcius , normal boiling point, 77 degree celcius density of liquid 1.59 g/mL; ; enthalpy of fusion 3.28 kJ/mol vapor ...

### chemistry

what mass of steam intially at 130 degree celcius is needed to warm 200 grams of water in a 100 gram container from 20 to 50 degree celcius

### chemistry

6.0 g potassium chromate is dissolved in 20 g water at 80 degree celcius. The solution is then cooled to 0 degree celcius. What mass of solute crystallises, assuming a supersaturated is not formed?

### Science

What is the approximate value of the solution after 1.75 if it is 19 degree celcius at 1.5 and 24 degree celcius at 2.0 minute?

### Physics

A piece of copper ball of mass 30grams at 150 degree celcius is placed in a copper calorimeter of mass 70gams containing 60grams of waterof copper 40degree celcius if the final ofthe mixture is 50degree celcius calculate the specific heat capacity of copper (specific heat ...

### PHYSICS

1. to make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. a steel rivet 1.871 cm in diameter is to be placed in a hole 1.869 cm in diameter at 20 degree celcius. to what ...

### chemistry

please help solve this problem now. I really need an answer. thank you When one mole of KOH is neutralized by sulfuric acid, q=-56kJ. At 22.8 C , 25.0 mL of 0.500 M H2SO4 is neutralized by 50.0 mL of 0.500 M KOH in a coffee-cup calorimeter. What is the final temperature of the...

### Chemistry

A coffee-cup calorimeter initially contains 125 g water at 24.2 degrees celsius. Potassium bromide (10.5 g), also at 24.2 degree celsius, is added to the water, and after the KBr dissolves, the final temperature is 21.1 degrees celsius. Calculate the enthalpy change for ...

### Chemistry

Problem: Assume 200.0 mL of 0.400M HCl is mixed with 200.0 mL of 0.400M NaOH in a coffee-cup calorimeter. The temperature of the solutions before mixing was 25.10°C; after mixing and allowing the reaction to occur, the temperature is 27.78°C. What is the enthalpy chanfe when...