Best Answer:<span> </span><span>Sorry its kind of hard to explain, you just need to study hesslaw, practice makes perfect, keep studying!
A. REACTION 2 IS MULTIPLIED BY 3 (HESS LAW)
ΔH2= -6129 j
B. IF REACTION IS REVERSED YOU FLIP THE SIGN OF ΔH
ΔH = 92.3 kJ
C. KIND OF HARD TO EXPLAIN, BUT I CAN TRY AND SHOW YOU
EQUATION 1 (FLIP) CH4 --> C + H2
EQUATION 4 (FLIP AND MULTIPLY BY 2) H2O(g) --> H2O(l)
ΔH = -890.7</span>
Answer:
We expect the enthalpies of combustion of two isomers to be different.
The molecular formular of the two molecules are very similar.
So the balanced chemical equation for the two combustion reactions are the same.
Explanation:
In calculation of the combustion enthalpiesfrom the isomers of the products and reactant.
The difference will be in the standard enthalpies of formation of the two combustion products.
The rod-shaped n- octane has vibrational and rotational motion possible more than the almost spherical neoprene.
The cost for one pound is $8.28. Please give me brainliest!!
Answer:
127 mL is the volume for the 45.8 g of LiCl
Explanation:
Molarity of solution: 8.50 M
We know, from this data that 8.50 moles of solute (LiCl), are in 1L of solution
Let's find out the volume for the 45.8 g of LiCl, by a rule of three.
We convert the mass to moles, before: 45.8 g . 1mol / 42.39g = 1.08 moles
Therefore:
8.50 moles of LiCl are found in 1L of solution
Our 1.08 moles will be found in (1.08 mol . 1L) / 8.50 mol = 0.127 L
We can convert the volume from L to mL: 0.127L . 1000 mL/1L = 127mL