Question

For the reaction, NH3 (g) + HCl (g) → NH4Cl (s) run at 95°C, ΔS = -284 J/K, and ΔH = -176 kJ. What is ΔG for this reaction?

-149,020 J

-91,368 J

-71, 488 J

104,336 J
@Somy @Abmon98 @Abhisar

Answer 1

whats S and whats G

Answer 2

@Somy ΔGosystem = ΔHosystem - T ΔSosystem

Answer 3

good girl
you just answered your own question :3

Answer 4

lol so i subtract right cuz when i did it gave me a different answer @Somy

Answer 5

T - is temperature i suppose

Answer 6

so did u multiply temp by S value?

Answer 7

yes @Somy

Answer 8

in Kelvin unit or Celsius?

Answer 9

idk am not good at chem i told you @Somy

Answer 10

do it in Kelvin unit
Celsius + 273= Kelvin

Answer 11

and only then do the calculation

Answer 12

386 divided by 49984

Answer 13

95+273= ....K
\(ΔGosystem = ΔHosystem - T \times ΔSosystem\)
\(ΔGosystem = -176 kJ - ...K \times -284 J/K\)

Answer 14

you do know that multiplication and division is first
only then its subtraction and addition - this is math

Answer 15

104336 @somy answer D

Answer 16

it was worng :( @Somy

Answer 17

im not familiar with this
this is the answer you get according to the formula you gave

Answer 18

ik chem sucks @Somy

Answer 19

@abb0t

Answer 20

oh i got it

Answer 21

First of all we are making mistake in unit
ΔGosystem = ΔHosystem - T ΔSosystem
ΔHosystem = kj
T= K
ΔSosystem= kj/K

this is the thing
the question gives unit of S as J/K
which means we have to divide that value by 1000
only then we can get the right answer
after u calculate it
multiply the answer by 1000 = coz the answer will be in kj and options are in J

Answer 22

ΔHosystem= -176 kJ
T= 95+273= 368 K
ΔSosystem= -284 J/K /1000= -0.284 kJ/K

and thus
ΔGosystem = ΔHosystem - T ΔSosystem

ΔGosystem = -176 kJ - 368*(-0.284)

Answer 23

?

Answer 24

is it correct @abb0t ?

Answer 25

OH !
yes it's correct

Answer 26

@Abhisar ❤_❤ yup i just learnt it :3