Universal Gas Constant, R L-atm/mol-K) Popping Pressure (atm) Sample Calculation: 0604x0.08214.9m, 498k A Or 0024 mel k 0.03 motx 0.082/my.498k 0.0024 motk Average Popping Pressure (atm) Sample Calculation: 800 0000 00821 0.0821 800 atm 000atm 2033 700atm 14200-700 14200 = 700 2 Post-Laboratory Questions 1. Convert your average pressure a. to mmHg 700 atm x 760mm Hg latm 532000mmHg b. to kPa. 2. If not all the popcorn kernels popped: a. the calculated volume of water in the kernels will be (unchanged/inaccurately high/inaccurately low) b. the calculated moles of water in the kernels will be (unchanged/inaccurately high/inaccurately low) c. the calculated temperature of water in the kernels will be (unchanged/inaccurately high/inaccurately low). Therefore, the ultimate calculation of pressure if not all the popcorn kernels popped is 3. If you burn the popcorn: a. The change that has occurred is b. This change results in the production of C. This change will cause the mass after popping to (increase/decrease/stay the same) (overestimated/underestimated) d. Burnt popcorn will lead to a calculation of moles of water that is (physical/chemical). (solids/liquids/gases). (unchanged/inaccurately high/inaccurately low) Therefore, the ultimate calculation of pressure if you burn the popcorn is (overestimated/underestimated) 4. Why do we need to convert our temperature units to Kelvin before calculating pressure? 5. If you did not make sure all the water was evaporated from inside the flask before weighing: the calculated volume of water in the kernels will be a. (unchanged/inaccurately high/inaccurately low) b. the calculated moles of water in the kernels will be (unchanged/inaccurately high/inaccurately low) c. the calculated temperature of water in the kernels will be

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