• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Popcorn Lab

Extracts from this document...


Data Collection Table 1. Mass of object(s) before heating the popcorn. Object (s) Mass (g � 0.01 g) Weighing cup 25.20 Corn and Weighing cup 27.48 Flask and Oil 103.40 Flask, Oil and Unpopped corn 105.74 Table 2. Measurements made during the displacement of unpopped corn. Material(s) Volume (mL� 0.1 mL) Volume of water 4.90 Volume of water and corn 6.80 Objects Mass (g � 0.01 g) Mass of flask, oil and popped corn 105.43 Table 3. Mass of object(s) after heating the popcorn. Qualitative Data Table 4. Qualitative observations of the corn before and after heating. Before Heating After Heating Corn (Supreme Brand) Yellow Hard Smooth Small White Soft Bumpy Bigger Sample Calculations Mass of unpopped kernels Corn and weighing cup- weighing cup = 27.48g - 25.20g = 2.34g Error Propagation of Addition and Subtraction ?Z = ?[(?x2) + (?y2)] ?Z= error propagation ?x= value 1 uncertainty ?y = value 2 uncertainty Mass of unpopped kernels = ?[(0.01)2 + (0.01)2] = ?(0.0l2 + 0.0l2) ...read more.


Unpopped kernels 2.34 Popped kernels 2.03 Table 6. Volume of popcorn, mass and moles of water lost, percentage of water in kernels, and pressure of steam inside kernel at time of pop Volume of popcorn (mL� 0.0001 mL) Mass of water lost (g � 0.02 g) Moles of water lost (mol � 0.003 mol) Percent of water in kernels (% � 0.4 %) Pressure of steam inside kernel at time of pop (atm � 27.60 atm) 0.0019 0.31 0.017 13.2 365.82 Conclusion and Evaluation Conclusion Popping popcorn requires the heating the corn until the pressure inside the kernel is greater than the pressure outside to cause the outer layer of the corn to burst and turning it inside out and release the moisture inside. The percentage of the water lost was calculated to 13.2% � 0.4% . The pressure inside the kernel at the time of pop was calculated using the ideal gas law which states that when particles that occupy the same volume under a constant temperature, any changes in volume is inversely proportional to pressure changes 1. ...read more.


This would make the calculation of the pressure inaccurate since it depends the value of the temperature. Improvements Improvements that could be made to this experiment include allowing more time for the corn to dry after displacing the kernels so there would not be excess moisture to alter the mass of water lost. The use of a curved sponge to clean and dry the inside of a Erlenmeyer flask would eliminate the chance of moisture remaining inside that could causes the mass of water lost to increases. Also, choosing kernels of similar sizes would improve the chance of the corn having uniform pressure inside the kernel at the time of pop and in turn improve the accuracy of the calculation of the pressure inside the kernel. More trials of this experiment could have been done to improve the accuracy of the results. Perhaps, calculating the atmospheric pressure and comparing that with the pressure inside the corn would help with a greater understand of the amount of pressure inside the corn if there was a comparison. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Chemistry essays

  1. A comparison of various proprieary antacids

    On the contrary, if the addition of sodium hydroxide has been stopped slightly after the end point of the equivalence point( the point of neutralisation) the moles of hydrochloric acid would have been overstated. This would occur if the phenolphthalein indicator had already experienced a colour change, and yet the addition of drops of sodium hydroxide base still continued.

  2. Crude Oil

    Once the location of an oil trap is found, it is marked using GPS coordinates on land or by marker buoys on water. Once the site has been selected, and legal as well as environmental issues have been dealt with, the crew begins to prepare for drilling.

  1. Investigating Pressure Laws

    Procedure: First, the pressure in the flask will be measured at room temperature and then the flask will be placed in a water bath so the temperature of the bath can be increased by small increments to determine the effect of temperature on vapour pressure.

  2. hess's law

    room temperature and pressure in the school laboratory and the time interval after which the temperature of the system was measured and noted down i.e. 0.5 minute or 30 seconds. MATERIALS AND METHOD Apparatus Used: > 1 polystyrene cup > Glass rod > Tripod stand > Electronic mass balance >

  1. Percentage of Water In Popcorn

    Multiple trials were used in this experiment to increase the chances of accuracy and to determine which data is reliable. If there were not multiple trials, then there is no way of knowing whether the data collected by one trial is accurate or completely inaccurate.

  2. Chemistry thermo lab, Hess's Law.

    It is multiplied by an integer (-1) so it is the same unc. As for the moles: 1. 2. Finally, the change in enthalpy: 1. 2. 3. Now, we use Hess?s law to calculate the change of enthalpy of formation: 1. MgO(s) + 2HCl(aq) MgCl2(aq) + H2O(l) 2. Mg (s) + 2HCl(aq) MgCl2(aq) + H2 (g) 3.

  1. Organic lab. Comparison of alkanes and alkenes

    Since there is no color change (the fucsia just happens to be the predominant color) no reaction occurred. When the fucsia potassium permanganate is added to the clear hexane and sulfuric acid, initially the whole solution turns fucsia. However right after there is a color change and the solution goes from fucsia, to light pink, to clear again.

  2. The chemistry of atmospheric and water pollution.

    Use di, tri, tetra when there is more than one atom of any halogen. Identify the longest carbon chain Number the carbon chain giving the lowest set of numbers to the halogens present Consider the compound C5H10BrCl. These are some of its isomers: Point 4.10 ? Discuss the problems associated

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work