Part A When 1.547 g of liquid hexane (C6 H14) undergoes combustion in a bomb calorimeter, the temperature rises from 26.16 C to 38.45 °C. Find AErxn for the reaction in kJ/mol hexane. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.79 kJ/ C. Express your answer using three significant figures.

Part A When 1.547 g of liquid hexane (C6 H14) undergoes combustion in a bomb calorimeter, the temperature rises from 26.16 C to 38.45 °C. Find AErxn for the reaction in kJ/mol hexane. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.79 kJ/ C. Express your answer using three significant figures.

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...

See similar textbooks

Similar questions

Acetylene, C 2 H 2 , is used in welding torches. It releases a lot of energy when burned in oxygen. The combustion of one gram of acetylene releases 48.2 kJ. A 0.750-g sample of acetylene is burned in a bomb calorimeter ( heat capacity = 1.117 kJ / °C ) that contains 800.0 g of water. The final temperature of the bomb and water after combusion is 35.2°C. What is the initial temperature of the bomb and water?
The conversion of sulfur dioxide to sulfur trioxide is exothermic: SO2 (g) + ½ O2 (g) → SO3 (g) ΔH°rxn = ??? A certain exothermic reaction occurs in a coffee cup calorimeter that contains 425 mL of water. When the reaction reaches completion, the temperature of the water has increased by 2.37°C. If 3.47 g of SO3 are produced in the reaction, what is ΔH°rxn?
A 6.78 g sample of methanol was combusted in a bomb calorimeter. The temperature of the calorimeter increased by 12.7 °C. If the molar mass of methanol is 32.04 g/mol, and the heat capacity of the calorimeter is 5,104 J/°C, what is the molar AE for this reaction, in kJ/mol? Do not report units in your answer. Report your answer to one decimal place and include the correct sign.
The enthalpy of combustion of isooctane (C8H18), one of the many hydrocarbons in gasoline is 5.45 × 103 kJ/mol. Calculate the enthalpy change per gram of isooctane and per liter of isooctane (d = 0.688 g/mL).
In a calorimetric experiment, 6.24 g of lithium hydroxide, LIOH, was dissolved in water. The temperature of the calorimeter rose from 25.0°C to 36.7°C. What is AH for the solution process? LIOH(s) + Li* (aq) + OH (ag) The heat capacity of the calorimeter and its contents is 547 J/°C. ΔΗ- kl/mol
A chemist carefully measures the amount of heat needed to raise the temperature of a 1.54 kg sample of C5H₁2S from 5.8 °C to 17.4 °C. The experiment shows that 3.51 × 104 J of heat are needed. What can the chemist report for the molar heat capacity of C5H₁2S? Be sure your answer has the correct number of significant digits. 12 - 1 – 1 K J. mol x10 X Ś 6 0 U
The sugar arabinose, C5 H10 O5, is burned completely in oxygen in a calorimeter. C5 H10 O5 (8) + 502(g) → 5CO2(g) + 5H2 O(1) Burning a 0.541 g sample caused the temperature to rise from 20.00°C to 20.54°C. The heat capacity of the calorimeter and its contents is 15.2 kJ/°C. Calculate AH for the combustion reaction per mole of arabinose. ΔΗ+ kJ/mol
An 80.0 g sample of metal, initially at 96.0 °C, is placed into 150.0 g of water initially at 26.0 °C in a calorimeter. The final temperature of the water is 28.1 °C. What is the identity of the metal? (The specific heat of water is 4.18 J/g °C.) Metal Aluminum Copper Iron Magnesium Silver Tin Titanium Specific Heat Capacity J/(g•°C) 0.90 0.38 0.45 1.00 0.23 0.32 0.52 A) Fe B) Sn C) Ag D) Cu
When 9.42 g of methane (CH4) is burned in a bomb calorimeter (heat capacity = 2.677 × 103 J/°C), the temperature rises from 24.00 to 27.08°C. Calculate the enthalpy change for the following reaction. (C= 12.00 amu, H = 1.00 amu) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) Group of answer choices a. 8.425 kJ b. –14.01 kJ c. –8.425 kJ d. 8245 J e. 14.00 kJ
An 8.0 g sample margarine was placed in a bomb calorimeter. It was then completely combusted leading to a temperature change of 36.18 °C. The heat capacity of the calorimeter was previously determined to be 7.25 kJ/kg°C. What was the quantity of heat released to the environment by the sample of margarine?
A student conducted several calorimetry investigations. In the first of the investigations, the student heats a 21.0 g price of metal that is know to have a specific heat capacity of 0.449 J/g°C to a temperature of 80°C. Then a piece of metal is added to the beaker of water (70.0 grams at 20.00°C). The specific heat capacity of water is 4.187 J/g°C. If the student repeated the investigation with 50.0 g of water instead what would be different.
A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 6.30 kg of water at 21.7 °C. During the reaction 143. kJ of heat flows out of the bath and into the flask. Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions iS 4.18 J·g¯¹·K¯¹. Round your answer to 3 significant digits.