insulated container A sample of polystyrene, which has a specific heat capacity of 1.880 J-g ¹.C¹, is put into a calorimeter (see sketch at right) that contains 200.0 g of water. The polystyrene sample starts off at 85.8 °C and the temperature of the water starts off at 16.0 °C. When the temperature of the water stops changing it's 23.1 °C. The pressure remains constant at 1 atm. Calculate the mass of the polystyrene sample. Be sure your answer is rounded to 2 significant digits. water sample 0 ? S a calorimeter A 10 ob Ar

insulated container A sample of polystyrene, which has a specific heat capacity of 1.880 J-g ¹.C¹, is put into a calorimeter (see sketch at right) that contains 200.0 g of water. The polystyrene sample starts off at 85.8 °C and the temperature of the water starts off at 16.0 °C. When the temperature of the water stops changing it's 23.1 °C. The pressure remains constant at 1 atm. Calculate the mass of the polystyrene sample. Be sure your answer is rounded to 2 significant digits. water sample 0 ? S a calorimeter A 10 ob Ar

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 1.4710 g sample of maleic acid (C4H4O4) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1159 g of water. During the combustion the temperature increases from 22.46 to 25.59 °C. The heat capacity of the calorimeter, not including the surrounding water, was determined in a previous experiment to be 852.2 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of maleic acid based on these data. Assuming that no energy is lost to the surroundings, what is the molar heat of combustion of maleic acid, based on these data? (in kJ/mol). C4H4O4(s) + 3O2(g) → 2 H2O(l) + 4 CO2(g) + Energy
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A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 0.3215 g sample of phenanthrene (C14H10) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.162×10 g of water. During the combustion the temperature increases from 25.15 to 27.48 °C. The heat capacity of water is 4.184 J glc-!. The heat capacity of the calorimeter was determined in a previous experiment to be 769.3 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of phenanthrene based on these data. C14H10(s) + (33/2) O,(g) – → 5 H,O(1) + 14 CO2(g) + Energy Molar Heat of Combustion = kJ/mol