Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 71 mL of water from 28°C to 73°C. Express your answer using two significant figures.
Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 71 mL of water from 28°C to 73°C. Express your answer using two 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...
Related questions
Question
Can you explain Part B?

Transcribed Image Text:v Compiete
I Review | Constants Periodic Table
Meals-ready-to-eat (MRES) are military meals that can
be heated on a flameless heater. The heat is produced
by the following reaction:
Mg(s) + 2H2O(1)→Mg(OH)2(s) + H2(g).
Calculate the standard enthalpy change for this reaction.
Express your answer using four significant figures.
AHn
= -353.0 kJ
Submit
Previous Answers
Correct
Part B
Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 71 mL of
water from 28 °C to 73 °C.
Express your answer using two significant figures.
Submit
Previous Answers
Answer Requested
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