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german
2 years ago
11

Pls help if you only know the correct answer! Thanks! :)

Chemistry
1 answer:
serious [3.7K]2 years ago
5 0

Answer:

i think itd be an  exothermic reaction

Explanation:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise.

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Lab: Calorimetry and Specific Heat
gayaneshka [121]

Answer:

Title for the lab--->Calorimetry and Specific Heat

Name:

Teacher:

Date:

Purpose: Explore how the specific heat of a substance can be determined using a “coffee cup” calorimeter.

Question: How can you determine the specific heat of a metal using a calorimeter?

Hypothesis: If a metal has a low specific heat, then the metal could make an excellent material for cookware because it takes less heat to raise the temperature of the metal to cook food.

MATERIALS:

- Two polystyrene coffee cups

- Lid for polystyrene cup

- Thermometer      

- 250 mL beaker        

- 400 mL beaker    

- Ring stand    

- Two buret clamps    

- Hot plate  

- Test-tube holder    

- 50 mL graduated cylinder  

- Water    

- aluminum, copper, iron, and lead powder    

- Analytical balance

PROCEDURE:

1) Set up a 600 mL beaker and add 400 mL of dis"lled water inside and place it on a hot plate un"l it boils. Also set up 2 dry Styrofoam cups with a lid aside and add 100.0 mL tap water (calorimeter water) inside.

2) In the boiling water, place the unknown metal sample inside for about 30 min. Before though, weigh it accurately and record the mass on your data sheet.

3) After 30 min, take the temperature of boiling water to the nearest 0.1 °C (Ini"al temp of metal), then take the metal out of the boiling water and replace it into Styrofoam cups filled with room temperature tap water. Ini"al temperature of water is the room temperature of the tap water.

4) Take every 15 seconds for about 2 minutes the temperature of water inside the calorimeter with a thermometer inserted through the hole in the lid. Gently swirl the cup to mix the contents and record the temperature. Use the highest temperature.

5) Calculate the specific heat of the metal sample.

then the table will be in the picture i posted on here  

next is your ---> Analysis /Conclusion

Analysis:

Analyzed from the data above, we know the temperature that is measured depends on the amount of mole in the solution. If the amount of mole in the solution is large, the temperature will be as well. After a few moments, the temperature rises and falls, and in some instances, it remains steady.

Conclusion:

In conclusion, I do believe my hypothesis was supported through my experiments. Through said experiments, I identified the unknown metal as we calculated the changes in the heat, and found that the metals that should be put to use are copper and iron metals. Copper and iron have a low specific heat, which makes these ideal metals when creating cookware. When a metal has low specific heat, it needs less energy to produce heat and it cools down with less energy as well. For these reasons, my hypothesis is supported.

Explanation:

hope this helps :)

5 0
2 years ago
Precipitation tends to be _______ on the _______ side of a mountain because water vapor _______ as it rises there.
Sergio039 [100]
Precipitation tends to be HIGHER on the WINDWARD SIDE of the a mountain because water vapour CONDENSES as it rises there. 
There are two sides to every mountain, the windward and the leeward sides. The windward side experience more rainfall while the leeward side is drier and warmer. 
4 0
3 years ago
Read the following hypothesis about why a chicken bone becomes bendy after being soaked in vinegar:
Studentka2010 [4]

Answer:

B. observing that a bone placed in a beaker of acid becomes bendy

Explanation:

The hypothesis suggests that when chicken bones are placed in vinegar, they become bendy due to the loss of calcium in their bones.

Calcium is identified as the ossifying material that strengthens the bone. When the acid that makes up the vinegar comes in contact with it, calcium is removed from the bone.

Now we know that calcium has capabilities of reacting with acids.

This suggests that if we also place the bone in an acid, they will bend due to reaction of calcium in the bones with the acid.

5 0
2 years ago
Read 2 more answers
An ether and alkene are formed as by products in this reaction. draw the structures of these by-products and give mechanisms for
kari74 [83]

Answer:

sim eu também preciso desta respota

8 0
2 years ago
Name the following compounds and classify them as ionic or covalent.
katrin2010 [14]
A-copper chromate oxide ionic I think
B-barium nitrate ionic
C-chlorine monoxide ionic
D- Bromine pentafluoride covalent
6 0
2 years ago
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