A researcher studying the nutritional value of a new candy places a 3.90 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.05 °C. If the heat capacity of the calorimeter is 42.80 kJ-K-1, how many nutritional Calories are there per gram of the candy? Calories per gram of candy: Cal/g > TOOLS x10

A researcher studying the nutritional value of a new candy places a 3.90 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.05 °C. If the heat capacity of the calorimeter is 42.80 kJ-K-1, how many nutritional Calories are there per gram of the candy? Calories per gram of candy: Cal/g > TOOLS x10

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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When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. Thermometer Cardboard or In the laboratory a general chemistry student finds that when 1.17 g of KOH(s) are dissolved in 106.20 g of water, the temperature of the solution increases from 24.57 to 27.36 °C. Styrofoam lid The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.78 J/°C. - Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of KOH(s) in kJ/mol. Reaction occurs in Assume the specific heat of the solution is equal to the specific heat of water. solution. ΔΗ, dissolution kJ/mol ookC Cangage Lang
11. A 114.06 mL sample of 0.245 M aqueous hydrochloric acid is added to 122.18 mL of 0.172 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 498.075 J/K. The following reaction occurs when the two solutions are mixed. HCl(aq) + NH3(aq) → NH4Cl(aq) The temperature increase is 2.03°C. Calculate ΔH rxn. Answer=____________________kJ/mol
A researcher studying the nutritional value of a new candy places a 3.30 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.02 °C. If the heat capacity of the calorimeter is 40.50 kJ-K-¹, how many nutritional Calories are there per gram of the candy? Calories per gram of candy: r x10 TOOLS Cal/g
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100.0 mL of cold water at 20.5 oC was poured into a styrofoam coffee cup calorimeter. After adding 100.0 mL of hot water at 30.5 oC and mixing it thoroughly, the temperature of the mixture was found to 24.7 oC. Find the heat capacity of the calorimeter. [Specific heat capacity of water is 4.184 J/goC. Assume density of water is 1.0 g/mL at both temperatures.]
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When 0.625 grams of ethanol(C2H5OH) undergoes combustion in a bomb container calorimeter attaining a temperature difference of 2.8°C. Find the heat of the reaction for the combustion of the ethanol in kj/mol. The heat capacity of the calorimeter is found to be 5.17kj/°c.
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