A student reacts 2.0 moles A and 4.0 moles of B in an insulated container. The reaction takes place in water (50.0 g), in a coffee cup. The water gains heat, raising its temperature 23.6°C (AT). Water has a specific heat capacity of 4.184 J/g °C. A + 2B 3 C AHRXN = ? 1 a. Energy is absorbed by the water. What is qWATER? b. Energy is released by the reaction. What is qRXN? (this one is easy) c. How much heat per mol of A (or per 2 mol of B), by the reaction (AHRXN)? d. In another reaction, a student reacts 15.2 moles of B with excess A. What is the heat that comes out of his second reaction (qRXN-2)? use dimensional analysis +

A student reacts 2.0 moles A and 4.0 moles of B in an insulated container. The reaction takes place in water (50.0 g), in a coffee cup. The water gains heat, raising its temperature 23.6°C (AT). Water has a specific heat capacity of 4.184 J/g °C. A + 2B 3 C AHRXN = ? 1 a. Energy is absorbed by the water. What is qWATER? b. Energy is released by the reaction. What is qRXN? (this one is easy) c. How much heat per mol of A (or per 2 mol of B), by the reaction (AHRXN)? d. In another reaction, a student reacts 15.2 moles of B with excess A. What is the heat that comes out of his second reaction (qRXN-2)? use dimensional analysis +

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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Question

A student reacts 2.0 moles of A and 4.0 moles of B in an insulated container. The reaction takes place in water (50.0 g), in a coffee cup. The water gains heat, raising its temperature 23.6°C (ΔT). Water has a specific heat capacity of 4.184 J/g°C.
A + 2 B → 3 C ΔHRXN = ?

a. Energy is absorbed by the water. What is qWATER?

b. Energy is released by the reaction. What is qRXN? (this one is easy)

c. How much heat per mol of A (or per 2 mol of B), by the reaction (ΔHRXN)?

d. In another reaction, a student reacts 15.2 moles of B with excess A. What is the heat that comes out of his second reaction (qRXN-2)? Use dimensional analysis.

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Step 2: Calculation for heat absorbed by water!

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Step 3: Calculation for heat released by reaction!

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Step 4: Calculation for enthalpy of reaction!

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Step 5: Calculation for heat released when 15.2 mole B reacts!

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