Insulated Sample BurningoutsidedishsamplechamberSteelbombCombustion (bomb) calorimeter.In an experiment, a 0.6629 g sample of phthalic acid (C8H604) is burned completely in a bomb calorimeter. The calorimeter is surrounded by1.046 x 10³ g of water. During the combustion the temperature increases from 24.04 to 26.63 °C.The heat capacity of water is4.184 J-g¹. C-¹.The heat capacity of the calorimeter was determined in a previous experiment to be788.9 J. ˚C-¹.Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion ofphthalic acid based on these data.C8 H6 O4(s) + (15/2) O2(g) → 3H₂O(l) + 8CO2 (g) + EnergykJ/molMolar Heat of Combustion =

Mass of water = 1.046*103 g Mass of the phthalic acid = 0.6629 g Initial temperature = 24.04 0C…

Answered: In an experiment, a 0.6629 g sample of…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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A single effect evaporator was used to concentrate 8000 kg / hr of tomato juice from 5% total solids to 30% total solids. The juice enters the Evaporator at 20 ° C. The evaporator is operated on Steam (85% quality) at 143.27 kPa. The vacuum in the evaporator allows the juice to boil at 75 ° C. The specific heat of the dilute material is 4.1 kJ / (kg ° C) and the concentrate product is 3.1 kJ / (kg ° C). Count it a. Steam demand rate = kg / hour. b. Steam economy when condensate temperature is released at 75 ° C. = (kg of water evaporates / kg of steam)
4. A 1.500-g sample of gasoline was burned in a bomb calorimeter whose total heat capacity is 13.20 KJ/°C. The temperature of the calorimeter increased from 23.00°C to 27.50°C. (a) What is the experimental heat of combustion of kerosene? (b) If the true value of heat of combustion of kerosene is 43.00 KJ/g what is the percent error?
Using the data given below, estimate the enthalpy added to 1 kg of water that undergoes the following transformations: (a) from 0 °C to 90 °C at p = 105 Pa; (b) from 95 °C to 105 °C at p = 105 Pa; (hint: combine enthalpy of vaporization and enthalpy change as a result of heating for 10 °C, which can be based on enthalpy change for every 10 °C for liquid water) (c) from 95 °C to 105 °C at p = 1.2 ´105 Pa (similar to 2, but a different pressure condition).
Propane (C3H8) is a possible alternative automobile fuel with a density of 4.0 lb/gal and a standard enthalpy value Hº = -104.2 kJ/mol. Find its higher heating value (HHV) and net heat of combustion (LHV) in kJ/mol and in Btu/gal.
Number 1A food product containing 75% moisture content is being frozen. Estimate the specific heat of the product at -10°C when 87% of the water is frozen. The specific heat of the dry product is 2.5 kJ/(kg°C). It is assumed that the specific heat of water at -10°C is the same as the specific heat of water at 0°C, and that the specific heat of ice follows the function Cp es = 0.0062 Tbeku + 2.0649. identify :a. Cp frozen product = Answer in kJ/kg°C
As part of a constant pressure calorimetry experiment for a reaction in water, you measured a temperature change from 275 K to 300 K for the water in the calorimeter. How much heat in Joules was released by the reaction if the calorimeter had 10 mL of water in it (assuming that the density of water = 1.0 g/mL)?
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What amount of heat energy is required to heat 2.50 grams of water at 45°C (c = 4.18 J/g°C) to 85°C? er]
1:02 AM ll Verizon 99%- Done 4. The enthalpy of vaporization of water at 100 °C is 2256.9 kJ/Kg. Assuming an average heat capacity for liquid water and heat capacity of vapor calculate the heat of vaporization at 25 °C. At 25 °C the vapor pressure of water is 23.756 mm Hg.
Number 1A food product containing 80% moisture content is being frozen. Estimate the specific heat of the product at -6°C when 82% of the water is frozen. The specific heat of the dry product is 2.5 kJ/(kg°C). It is assumed that the specific heat of water at -10°C is the same as the specific heat of water at 0°C, and that the specific heat of ice follows the function Cp es = 0.0062 Tbeku + 2.0649. identify :a. Cp frozen product = Answer in kJ/kg°C
Number 1A food product containing 82% moisture content is being frozen. Estimate the specific heat of the product at -8°C when 82% of the water is frozen. The specific heat of the dry product is 2,5 kJ/(kg°C). It is assumed that the specific heat of water at -10°C is the same as the specific heat of water at 0°C, and that the specific heat of ice follows the function Cp es = 0.0062 Tbeku + 2.0649. identify :a. Cp frozen product = Answer in kJ/kg°C
An unfrozen food product has a specific heat of 4 kJ/kg°C and a latent heat of fusion of330 kJ/kg. Once it is frozen its specific heat is 1.98 kJ/kg°C. Its freezing point is -2°C.Determine the total amount of heat (W) to be removed to freeze 100 kg/h of the productfrom an initial temperature of 8°C to -18°C.

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