**Question:**Calculate the amount of heat involved in the conversion of 25.00 g of water at 100°C to steam at 100°C. (ΔH_vaporization = 40.7 kJ/mol)**Explanation:**To solve this problem, we need to determine how much heat is required to convert a given mass of water into steam at the same temperature, utilizing the enthalpy of vaporization.- **Step 1:** Calculate the number of moles of water. Water has a molar mass of approximately 18.02 g/mol. Number of moles (n) = mass (m) / molar mass (M) \( n = \frac{25.00 \, \text{g}}{18.02 \, \text{g/mol}} \)- **Step 2:** Use the enthalpy of vaporization. The amount of heat (q) required can be calculated using: \( q = \Delta H_{\text{vaporization}} \times n \) Where \( \Delta H_{\text{vaporization}} = 40.7 \, \text{kJ/mol} \). Substitute the values from the previous steps to determine the total heat needed. Note that this calculation shows the process of vaporizing water at its boiling point without any change in temperature.

Given case Water at 100°C is converted to steam at 100°C

Answered: b) Calculate the amount of heat…

b) Calculate the amount of heat involved in the conversion of 25.00 g of water at 100° to steam at 100°. (AHvaporization = 40.7 kJ/mol)

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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Concept explainers

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.

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