Answer:
The sign of \Delta GΔG is negative.
The sign of \Delta HΔH is negative.
The sign of \Delta SΔS is negative.
Explanation:
The water vapor is adsorbed on silica gel due to strong hydrophilicity of silica get towards the water.
The thermodynamic properties of adsorbate and adsorbent changes after adsorption. Silica gel is very porous and hydrophilic, thus, it absorbs the water from the shoe box.
The adsorption process occurs spontaneously, therefore Delta G < 0.
When adsorption occurs, bonds are formed between water molecules and SiO2, and the bond formation process is exothermic (heat is released).
Thus, Delta H < 0.
The water molecules become immobilized on the surface when adsorption occurs, thus, entropy/disorder decreases.
So, Delta S < 0.
Explanation:
First, you need to be sure the elemental analysis has identified all the components.
83.7+16.3=100% so we’re good, and the same ratio works for the formula,
The formula is CxHy, so x*12+y*1= 100% of the empirical formula wt, which we’ll use later to confirm the elemental analysis. We need x and y
Then x = 83.7/12 is 6.975 and being savvy, we guess it’s supposed to be 7, since empirical formulas use whole numbers if they can. Likewise y=16.3/1 = 16.3, and now we round down to the nearest whole number (16), making our empirical formula C7H16
Check:
7*12+16*1=100 (the empirical formula wt) 84/100=0.84 and 16/100=0.16 This is close enough, so C7H16 is the empirical formula.
Answer:
2:2:1
Explanation:
The reaction expression is given as:
HXO → HX + O₂
We are to balanced this unbalanced reaction expression.
To solve this put, coefficient a, b and c before every specie:
aHXO → bHX + cO₂
Now use a mathematical approach to solve this;
Conserving H: a = b
X: a = b
O: a = 2c
let a = 1, b = 1 and c =
Multiply through by 2;
a = 2, b = 2 and c = 1
So;
2HXO → 2HX + O₂
Balanced ratio; 2:2:1