Can you please help with all 15) Given the data in the table below, rnn for the
ID: 697735 • Letter: C
Question
Can you please help with all
15) Given the data in the table below, rnn for the reaction is Substance AH f(k/mol) C2H4 (g) C2H5OH ) 2777 CH3CO2H )4845 H2oa) 523 -285.8 A)-79.0 B) -1048.0 C)-476.4 D)-492.6 E) The value of AH°f of O2 (g) is required for the calculation. 16) The ground state electron configuration of Ga is A) 1s22s23s23p64s23d104pl B) 1s22522p63s23p64s24d104p1 D) 1s22s22p63s23p64s23d104d1 E) [Arj4s23d11 17) what is the frequency of light (s-1) that has a wavelength of 3.86 × 10-5 cm? A) 7.77 x 1014 s-1 B) 6.32 x 10-12 s-1 C) 1.04 x 10-13 s-1 D) 9.62 x 1012 s-1 E) 2.14 x 10-16 s-1 18) The frequency of a photon that has an energy of 3.7 x 10-18 j is A) 5.6 x 1015 B) 1.8 x 10-16 C) 2.5 x 10-15 D) 5.4 x 10-8 E) 2.5 × 1015 sl. 19) Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar? A) Mg > Na > P> Si> Ar B) Ar > Si > P > Na> Mg C)Si > P> Ar> Na > Mg D) Na > Mg > Si > P>Ar E)Ar > P> Si> Mg>Na 20) Of the choices below, which gives the order for first ionization energies? A) CI> SAl> Ar >Si B) Ar >Cl> S>Si > Al C) Al > Si > S>C>Ar D) CI> S>Al > Si> ArExplanation / Answer
15) DH0rxn = (-484.5-285.8)-(-277.7+0) = - 492.6 kj
answer: D
16) Ga = 31 = [Ar] 3d10 4s2 4p1
answer: C
17) c = v l
(3*10^8) = v*(3.86*10^-3)
v = frequency = 7.77*10^14 s-1
answer: A
18) energy = hv
(3.7*10^-18) = (6.625*10^-34*v)
v = frequency = 5.6*10^15 s-1
answer: A
19) answer: D (left to right in periods atomic size decreases)
20) answer: B (atomic size increases, ionisation energy decreases)