Question

1. If I mix 200 g of water at 20C with 300 g of water at...

1. If I mix 200 g of water at 20C with 300 g of water at 30C, what will the result be?

2. If I have 250 g of water at 90C, how much water at 25C should I add to make the final temperature be 50C?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

1. Let X be the final temperature. The colder water will warm up to temperature X and the warmer water will cool down to temperature X. Therefore, the amount of heat energy lost by warmer water will be the heat energy gained by the colder water.

Heat energy (Q) = mass x tdiff x Cp.

Qlost = Qgain  

2. Using the above principle we will solve this problem. Let m1 be the mass of water required at 25C.

Thank You !!!

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You have 200 g of coffee at 55C, Coffee has the same specific heat as water....
You have 200 g of coffee at 55C, Coffee has the same specific heat as water. How much ice at -5C do you need to add in order to reduce the coffee’s temperature to 27C?
a- You have 200 g of coffee at 45 0C, Coffee has the same specific heat...
a- You have 200 g of coffee at 45 0C, Coffee has the same specific heat as water. How much ice at -10 0C do you need to add in order to reduce the coffee’s temperature to 30 0 b- A laboratory technician drops a 0.06 kg sample of unknown solid material, at a temperature of 100 0C, into a calorimeter. The calorimeter can, initially at 19 0C, is made of 0.2 kg of copper and contains 0.15 kg of...
A 500-g aluminum container holds 300 g of water. The water and aluminum are initially at...
A 500-g aluminum container holds 300 g of water. The water and aluminum are initially at 40∘C. A 200-g iron block at 0∘C is added to the water. Assume the specific heat of iron is 450 J/kg⋅∘C, the specific heat of water 4180 J/kg⋅∘C and the specific heat of aluminum is 900 J/kg⋅∘C . 1Determine the final equilibrium temperature.    2.Determine the change in thermal energy of the aluminum 3.Determine the change in thermal energy of the water. 4. Determine...
1. A 50-g sample of iron at 100oC is put into 75 g of water at...
1. A 50-g sample of iron at 100oC is put into 75 g of water at 0oC. What is the final temperature of the mixture? (The specific heat of iron is 0.11 cal/g Co.) 2. A machine part consists of 0.10 kg of iron and 0.16 kg of copper. How much heat is added to the gear if the temperature increases by 35oC? [Hint: Compute the heat required for each metal and add the numbers. State your answer in joules.]...
question 1) answer clearly In a calorimeter of negligible heat capacity, 200 g of steam at...
question 1) answer clearly In a calorimeter of negligible heat capacity, 200 g of steam at 150 ° C and 100 g of ice at -40 ° C are mixed. The pressure is maintained at 1 atm. What is the final temperature and how much steam, ice and water are present?
4. An iron container has a mass of 200 g and contains 50 g of water...
4. An iron container has a mass of 200 g and contains 50 g of water 40 C. 50 g of ice are poured at -6° C. Calculate the equilibrium temperature and describe the final composition. 5. We have a puddle of hot water @ 60 ° C exposed to air @ 28 ° C. Assume that the cooling constant of the water is 0.05/minutes. Calculate how long it will take the temperature on the surface of the water to...
A piston-cylinder contains 25 g of saturated water vapor and kept at 300 kPa. We add...
A piston-cylinder contains 25 g of saturated water vapor and kept at 300 kPa. We add to the saturated water vapor an amount of electrical work of 7.2 kJ (via a resistance heater). Simultaneously, we lose 3.7 kJ from the water. 1.Show the path on a PV diagram. 2.Determine the change in internal energy, the PV work, and the enthalpy of the system. 3.Determine the final temperature of the system
There is 300 grams of water in the 200-gram calorimeter cup (inner can). Both are at...
There is 300 grams of water in the 200-gram calorimeter cup (inner can). Both are at room temperature of 20 degrees Celsius. A 100-gram metal sample with an initial temperature of 90 degrees Celsius is placed in the calorimeter resulting. The resulting final temperature of the system is 30 degrees Celsius. If the calorimeter can has a specific heat of 0.2 cal/g-C degree, determine the specific heat of the metal sample
If combustion of a 5 g food sample raised the temperature of 200 g of water...
If combustion of a 5 g food sample raised the temperature of 200 g of water by 5 degree celcius, how much total heat energy was given off?
Show calculation for the preparation of 20 mL of reaction mix made of 0.8 g/L starch...
Show calculation for the preparation of 20 mL of reaction mix made of 0.8 g/L starch solution from 2 g/L starch stock solution and Phosphate/NaOH, pH 7 buffer. How much buffer should you add to get a final volume of 17.5 mL?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT