Compute the standard enthalpy change for the reaction

Reference no: EM13197092

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) + 2 H2O(l) ? Mg(OH)2(s) + H2(g)

a) Calculate the standard enthalpy change for this reaction using DHof values from Appendix C.

b) Suppose this reaction is used to heat a sample of water. Calculate the heat required to raise the temperature of 125 mL of water from 22.3 ?C to 74.8 ?C.

c) Calculate the grams of Mg Description: {\rm Mg}needed to supply this amount of heat.

Reference no: EM13197092

Questions Cloud

State bacteriorhodopsin is a protein found in halobacterium : Bacteriorhodopsin is a protein found in Halobacterium halobium that converts light energy into a transmembrane proton gradient that is used for ATP synthesis

State vibrational levels in the upper electronic state : the following vibrational levels in the upper electronic state of I2: A) between v=1 and v= 0: b) between v=4 and v=3; and between v=21 and v=20. comment on and explain this trend in terms of the quantum mechanical concept of constraint.

State the decomposition of hypothetical compound x : the decomposition of hypothetical compound X from part A is 1.60 M -1 * min -1, calculate the concentration of X after 16.0 min. Initial concentration is o.467

Define what is the approximate ph of a solution of the salt : What is the approximate pH of a solution of the salt NH4(O2CCH3) (ammonium acetate)? No calculations -- only reasoning needed. pKa/pKb values in your notes

Compute the standard enthalpy change for the reaction : 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) + 2 H2O(l) ? Mg(OH)2(s) + H2(g)

Write your suggestions to help a fellow student : Write your suggestions to help a fellow student succeed in this course using short sentences, and arrange them in decreasing order from greatest to least important.

Define microscopic and macroscopic model : macroscopic model describing what happens when solutions of salt (NaCl) and sugar (c12h22011) are prepared to measure their conductivity. Describe what you would observe before and after you added salt and sugar to water

Find the longest of the real-life distances : A triangle drawn on a map has sides of lengths 7 cm, 11 cm, and 14 cm. The shortest of the corresponding real-life distances is 92 km. Find the longest of the real-life distances to the nearest tenth of a kilometer.

Find the velocity of the rock : If a rock is thrown upward on the planet Mars with a velocity of 23 m/s, its height (in meters) after t seconds is given by H = 23t - 1.86t2. (Round all numbers to two decimal places.)

User Account

All Pages