Question about a bunsen burner lab?

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In summary, the conversation revolved around a lab write-up due the next day which involved determining the temperature of a bunsen burner flame. The experiment included heating copper and then immersing it in water, while recording temperature changes. The question that the person was struggling with involved taking into account the small mass of water that was evaporated during the experiment. Some suggestions were made, such as weighing the copper and water before and after the experiment, but none seemed to make sense.
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chemishard93
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Okay, I have a lab write-up due tomorrow and I am completely stumped on one of my conclusion questions.

The lab was an attempt to figure out the temperature of a bunsen burner flame. We did this by using a bunsen burner to heat copper and then immersing the copper into a cup of water and recording the temperature change. The question is asking us to take into account the small mass of water neglected in the equation that was evaporated into hot steam when the copper was immersed.

The equation was: -(mass copper)(Cp copper)(T3-T1)=(mass water)(Cp water)(T3-T2)

T1=burner temperature
T2=intial water temperature
T3=final water temperature

Okay...THE QUESTION I CAN'T FIGURE OUT IS: It takes about 2.26 kilojoules of energy to evaporate each gram of water. Suggest a way to include the evaporated water in your calculation.

I have tried to come up with solutions. However, none of them seem to make much sense...

PLEASE HELP! NEED HELP WITHOUT 3-4 HOURS!
 
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  • #2
Well... if you were to weigh the copper strip and the water in the calorimeter before heating and immersing the heated strip, you might have a good start on it.
 
  • #3
We did that, actually. Haha - sorry! Forgot to mention that.
 
  • #4
And, did you weigh it afterwards?
 

1. What is the purpose of using a bunsen burner in a lab?

A bunsen burner is a common piece of equipment used in scientific labs. Its main purpose is to provide a controlled source of heat for various experiments and processes. It can reach high temperatures quickly, making it ideal for tasks such as sterilizing equipment, heating solutions, and performing chemical reactions.

2. How do you properly use a bunsen burner?

To use a bunsen burner, first make sure it is connected to a gas source and the air holes on the base are open. Then, light the burner with a striker or match. Adjust the flame by turning the gas valve and adjusting the air holes until it is a steady blue flame. Always use tongs to handle the burner and never leave it unattended while lit.

3. What safety precautions should be taken when using a bunsen burner?

It is important to follow safety precautions when using a bunsen burner to prevent accidents and injuries. Some important precautions include always wearing safety goggles, keeping flammable materials away from the burner, using a heat-resistant mat or tile underneath the burner, and never pointing the flame towards yourself or others.

4. How do you extinguish a bunsen burner flame?

To extinguish a bunsen burner flame, first turn off the gas valve and then use a heat-resistant glove or tongs to close the air holes on the base. This will cut off the oxygen supply and the flame will go out. Do not blow on the flame as this can spread it and cause accidents.

5. What are some common uses for a bunsen burner in a lab?

Bunsen burners have a wide range of uses in a lab setting. Some common uses include heating solutions for experiments, sterilizing equipment, melting and evaporating substances, and performing chemical reactions that require high temperatures. They are also commonly used to heat and bend glass tubing for various purposes.

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