Answer:
c)
Explanation:
The reaction between ethene and HBr is:
CH2=CH2 + HBr → CH3CH2Br
Thus, the double bond C=C and the bond H-Br were broken, and the bonds C-C, C-H and C-Br were formed. The enthalpy of the reaction (the energy change), is the sum of the enthalpies of the reactions that were broken with the bonds that were created.
To break a bond, it's necessary to the molecule to gain energy, thus the process is endothermic and H>0, and to form a bond, it's necessary to release energy, and so H<0, so:
ΔH = ∑n*Hbroken - ∑n*Hformed, where n is the coefficient of the substance, so:
ΔH = (612 + 366) - (348+412+276)
ΔH = -58 kJ/mol
The minus signal indicates that the energy was released.
Answer:
Explanation:
The relation between standard Gibbs energy and equilibrium reaction is shown below as:
R is Gas constant having value = 0.008314 kJ / K mol
Given temperature, T = 300 K (Source Original)
Given,
So,
Also,
K₁ = 10*K₂
K₂ = 0.1 K₁
So,
Explanation:
[H+]=10^-pH
[H+]=10^-9.2
[H+]=6.031x10^-10
[OH-]=1x10^-14÷[H+]
[OH-]=1x10^-14÷[6.031x10^-10]
[OH-]= 1.66x10^-5
im pretty sure this is right
Answer:
It is Xylem!
Explanation:
I just now took the test in Eduphoria. Just trust me, and you will get this right. I promise!
Im sorry , Im confused reading this . maybe enter a image ?