Sunday

April 19, 2015

April 19, 2015

Posted by **Anonymous** on Saturday, November 20, 2010 at 11:17pm.

Having trouble with the second part

"The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. The source of energy in the heater is shown below.

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

Calculate the enthalpy change under standard conditions, in joules, for this reaction."

The second part of this problem is....

How many grams of Mg are needed to raise the temperature of 25.0ml of water from 25.0 C to 85.0 C

- chem -
**DrBob222**, Sunday, November 21, 2010 at 12:27amEnergy needed is q.

q = mass H2O x specific heat water x (Tfinal-Tinitial). Then

g Mg = 24.3 x (q kJ/352.9 kJ)

Check my thinking.

chemistry - 5. Meals-ready-to-eat (MREs) are military meals that can be heated ...

calculus - The question I'm having problems with is If f(x)=3x^2+7x+2, find f'(4...

Math - use substitution method for solving x+y=4 (x+2)^2+(y-3)^2=5 I got the ...

Math - use substitution method for solving x+y=4 (x+2)^2+(y-3)^2=5 I got the ...

Chemistry - What is the pH of the solution created by combining 12.20 mL of the...

Algebra help please - Part A: Divide (16x^5y^4 + 6x^3y - 2x^2y - 24x^2y^4) by -...

government - What is the tripartite view of political parties? Has this model ...

physics - Two 4.6 g bullets are fired with speeds of 36.9 m/s and 74.8 m/s, ...

algebra :( help me!! - The table below shows the weekly earnings of two groups ...

algebra - On the second part of her trip, Tamiko drove 21 miles less than two ...