# Chemistry

posted by .

If you have 320.0 mL of water at 25.00 °C and add 110.0 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.

• Chemistry -

Because you're just mixing water, the specific heat is the same for both liquids. So, it's just like adding a bunch of weighted numbers:

(320*25 + 110*95)/(320+110) = 42.91°C

You can use a fancy formula incorporating the specific heats, but they all cancel out in the end, since they're the same.

As a ballpark check, the average of 25 and 95 is 60°C, but you have more cool water than hot, so the result will be below the average.

• Chemistry -

Here's a little variation of this one:
"If you combine 310.0 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."

ANS: 42.07 Degrees

• Chemistry -

If you combine 310.0 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.

## Similar Questions

1. ### Chemistry

When 112 g of water at a temperature of 22.5°C is mixed with 65.1 g of water at an unknown temperature, the final temperature of the resulting mixture is 46.3°C. What was the initial temperature of the second sample of water?
2. ### Chemistry

If you have 290.0 mL of water at 25.00 °C and add 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture?
3. ### chemistry

cold water mass of calimeter+ water: 68.66g mass of calimeter: 19.19g mass of water: 49.47g final temperature of water: 39.1C initial temperature of water: 25.5C delta(T) of water: 13.6C hot water mass of calimeter+ water: 79.55g mass …
4. ### chemistry homework help!!

if you have 380.0mL of water at 25.00 degrees Celsius and add 140mL of water at 95.00 degrees Celsius, what is the final temperature of the mixture?
5. ### Chemistry

At room temperature, ethanol's density is 0.789 g/mL while water's density is 0.997 g/mL. When a few milliliters of ethanol are added to water, the two liquids mix. A student is given a unknown liquid at room temperature and experimentally …
6. ### chemistry

When 86.7 g of water at a temperature of 73 °C is mixed with an unknown mass of water at a temperature of 22.3 °C the final temperature of the resulting mixture is 61.7 °C. What was the mass of the second sample of water?
7. ### chemistry

When 86.7 g of water at a temperature of 73 °C is mixed with an unknown mass of water at a temperature of 22.3 °C the final temperature of the resulting mixture is 61.7 °C. What was the mass of the second sample of water?
8. ### Abby

If you have 320.0 mL of water at 25.00 °C and add 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture?
9. ### chemistry

If you combine 360.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture?
10. ### chemistry

If you combine 360.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture?

More Similar Questions

Post a New Question