A lab experiment on bomb calorimetry

Large metal can, like a coffee can Drill or hammer and nail Metal rod or skewer Thermometer capable of measuring in Celcius Needle Cork Procedure Fill the jug or large container with water and let it sit while you build your calorimeter. It should be room temperature by the time you have to use it. Insert the eye of the needle into the smaller end of the cork.

A lab experiment on bomb calorimetry

Do not put a sample in the bomb that will react explosively or which weighs more than 1. Do not overcharge the bomb with oxygen. The initial charge should not exceed 40 atm psig. The usual charging pressure is 30 atm. Make sure the bomb is completely submerged and electrodes attached before firing.

Stand clear of the bomb during firing and do not handle the bomb until the water temperature reaches steady state.

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When opening the top of the calorimeter, be sure to first pick up the lever that moves the thermometer, stirrer, and thermistor out of the bucket. Make sure the site glasses are removed before opening or closing the top of the calorimeter.

Do not move the knob on the control panel. It has been preset and should not be adjusted. Also, do not adjust the control valves in the back of the calorimeter as this may cause the calorimeter to overflow.

A lab experiment on bomb calorimetry

The hot water and cold water lines should already be connected. The gallon of distilled water can be placed inside a bucket of hot water until the desired temperature is attained. A second method requires step 3 to be performed, followed by the heating of the calorimeter bucket inside of a larger bucket of hot water.

A lab experiment on bomb calorimetry

This method is the quickest means of obtaining the initial temperature but the distilled water can easily overheat or extra water may be introduced into the calorimeter bucket. Fill the calorimeter bucket with grams of distilled water tap water may be used but distilled is preferred.

A graduated cylinder or a scale can be used to measure the correct amount of water. If the distilled water is being heated after it is placed in the calorimeter bucket, be sure no water is spilled or added to the calorimeter bucket and that all the water droplets are removed from the outside of the calorimeter bucket.

Place the calorimeter bucket such that the indentations on the bottom of the calorimeter bucket align with the plastic pegs on the bottom of the calorimeter.

Place the bomb head on the bomb head support stand as shown in Figure 2. Place the bomb cylinder in the clamp that is affixed to the table. Use the provided hex key to tighten the clamp. Use the scale in BHC to measure fuel weights. If your sample is solid e. Cut a 10 cm length of fuse wire and weigh it.

If more is needed in order to securely wrap around the capsule, cut another piece but be sure to weigh the piece on the electronic scale.

Twist the fuse wire around the gelatin capsule. Attach the fuse wire to the bomb head through the eyelet holes, as shown in Figure 2.

Carefully place the crucible in the ring. Make sure the fuse wire does not touch any part of the crucible. If the fuel is solid, place the fuel below the fuse wire so that the fuse wire touches the top of the fuel. If the fuel is in a capsule, place the wire wrapped capsule in the crucible.

The fuse wire should not be contacting the crucible. Carefully remove the bomb head from the stand and place in the cylinder. Carefully push straight down on the cylinder until the O-ring is below the top surface.

Place the screw cap on the cylinder and turn until tight. Close the thumb screw on the bomb head. Attach the thumb screw connector female threads from the oxygen filling unit onto the check valve on the bomb head the valve with the male threads.

Tighten the thumb screw.ME - Thermofluids Laboratory Spring LAB 2 - HEATING VALUE OF FUEL a steady-flow calorimeter to measure the heating value of gaseous fuels and the bomb calorimeter (constant-volume) for use with liquid and solid fuels.

Further, the conditions of the experiment are usually such that most of the steam condenses resulting in a. bomb is a strong metal container that can withstand the high pressures associated with the rapid combustion of a material and transmit the heat to its surroundings very quickly.

Inside the bomb is a. Chemistry. Put on your lab goggles and start learning chemistry with these resources. Find instructions for chemistry experiments and learn about chemical reactions, elements, and the periodic table in . Bomb Calorimetry. The coffee cup calorimeters used in high school science labs provides students with a worthwhile exercise in calorimetry.

But at the professional level, a cheap Styrofoam cup and a thermometer isn't going to assist a commercial food manufacturer in . In a constant-pressure calorimetry experiment, like the one that you will be performing, the energy released or absorbed is measured under constant atmospheric pressure.

Transcript of Experiment 1: A3 Bomb Calorimetry Experiment A3 Introduction Using Bomb Calorimetry to Calculate the Resonance Energy of Benzene Theory: Bomb Calorimetry Bomb .

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