Question

In: Chemistry

If you combine 360.0 mL of water at 25.00 °C and 100.0 mL of water at...

If you combine 360.0 mL of water at 25.00 °C and 100.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

Expert Solution

Let final temperature of mixture is T ^oC.

As density of water is 1.00 g/mL, Mass of water in gram is numerically equal to volume in mL.

Let for cooler water sample,

Mass = m = 360.0 g

Initital temperature = 25.00 ^oC

Final temperature = T ^oC

Increase in temperatue = (T-25.00) ^oC

Heat gain by water = Mass * Sp. heat of water * Increase in temperature

= 360.0 g * Sp.Heat of water * (T-25.00) ^oC

Then for hotter water sample,

Mass = m = 100.0 g

Initital temperature = 95.00 ^oC

Final temperature = T ^oC

Decrease in temperatue = (95.00-T) ^oC

Heat loss by water = Mass * Sp. heat of water * Decrease in temperature

= 100.0 g * Sp.Heat of water * (95.00-T) ^oC

On mixing two smpple we have,

Heat gain by water = Heat loss by water

360.0 g * Sp.Heat of water * (T-25.00) ^oC = 100.0 g * Sp.Heat of water * (95.00-T) ^oC

360.0 * (T-25.00) = 100.0 * (95.00-T)

360.0 T- 360.0 * 25.00 = 100.0*95.00 - 100.0T

460.0 T = 100.0*95.00 + 360.0 * 25.00

460.0 T = 18500

T = 40.22 oC

Final temperature of mixture is 40.22 ^oC.

====================XXXXXXXXXXXXXXX=================

queen_honey_blossom answered 2 years ago

If you combine 330.0 mL of water at 25.00 °C and 100.0 mL of water at...

If you combine 330.0 mL of water at 25.00 °C and 100.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

f you combine 320.0 mL of water at 25.00 °C and 100.0 mL of water at...

f you combine 320.0 mL of water at 25.00 °C and 100.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

If you combine 280.0 mL of water at 25.00 °C and 140.0 mL of water at...

If you combine 280.0 mL of water at 25.00 °C and 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

If you combine 400.0 mL of water at 25.00 �C and 140.0 mL of water at...

If you combine 400.0 mL of water at 25.00 �C and 140.0 mL of water at 95.00 �C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

A. You have 100.0 mL of 0.050 M acetic acid in water at 25 C. What...

A. You have 100.0 mL of 0.050 M acetic acid in water at 25 C. What are thre pH and pOH of this solution. B.What is the pKa for acetic acid? C.The pKa of trifluoroacetic acid (CF3CO2H) is 0.23. Which is a stronger acid? that or acetic acid?

Kemmi pipets 25.00 mL of pure 1-propanol (C3H7OH, a liquid organic alcohol) into a 100.0 mL...

Kemmi pipets 25.00 mL of pure 1-propanol (C3H7OH, a liquid organic alcohol) into a 100.0 mL volumetric flask. She dilutes it with water. Help her calculate the strength of her diluted solution. Volumes: 25.00 mL volumetric pipet, 100.00 mL volumetric flask. Molar mass of pure 1-propanol: 60.09 g/mol. Density of pure 1-propanol: 0.803 g/mL Calculate the number of moles in exactly 25.00 mL of 1-propanol. (3 significant figures; units of mol) [x] Calculate the molarity of the diluted solution. (3 significant...

You add 0.535 g of NaOH to 100.0 mL of water at 25

1) If 100.0mL water of at 50.0C is added to 100.0 mL of water at 20.0C....

1) If 100.0mL water of at 50.0C is added to 100.0 mL of water at 20.0C. What temperature would the mixture of water reach? Assume the system is perfectly sealed and no heat is lost to the calorimeter or to the outside environment. 2) If a student’s coffee cups are discarded after the first HCl reaction and new coffee cups are used only for the final reaction with acetic acid. How would this error impact the results? 3) A chemistry...

1. The hot metal piece weighing 2.500g at 100.0°C is dropped into 40.0 mL water at...

1. The hot metal piece weighing 2.500g at 100.0°C is dropped into 40.0 mL water at 20.0 °C. The final temperature of the system is 24.0°C. If the metal is treated as the system, the surrounding is: a) water b) styrofoam c) air d) metal 2. Is q(system) positive or negative ? 3. Calculate the specific heat of a solid metal (s(metal)), enter numerical value only. 4. According to the definition of q1, q2 and q3, calculate each of these...

Pipette 25.00 mL of the prepared sample into a 250 mL conical flask and add 20 mL of water.

Assay for Al3+ Pipette 25.00 mL of the prepared sample into a 250 mL conical flask and add 20 mL of water. Then, with swirling add, by pipette, 25.00 mL of 0.01 mol L-1 EDTA (you need to copy down the EXACT concentration (it therefore should not have just one or two significant figures!) of EDTA provided). Continue stirring, and add 20 mL of pH 4.5 buffer. (NOTE: The order of these additions is important). Heat the solution in...