Question

At which temperature range would the following reaction be spontaneous?
2NH4NO3(s) 2N2(g) + 4H2O(g) + O2(g) ?H = -236 kJ/mol ?S = 46 J/mol K
A. The reaction is never spontaneous.
B. at temperatures below 5130 K
C. at temperatures above 5130 K
D. The reaction is spontaneous at all temperatures.

Answer 1

I'm not sure how ΔG=ΔH−TΔS will help

Answer 2

do you know what spontaneity means?

Answer 3

@fifib

Answer 4

i mean I could look it up rn but it would be cheating lol so NO

Answer 5

spontaneity means DOES a reaction have a tendency to go from reactants to products.

It DOES NOT tell us how fast the reaction happens.

a spontaneous reaction could take a few minutes, days or even a month to happen.

Answer 6

Questions? if not i'll go on

Answer 7

what do you mean by 'GO FROM'

Answer 8

A + B --> C+ D

So reactants combine /react chemically to form products

Answer 9

Oh alright yes

Answer 10

sp yeah we need to use

\[\Delta G = \Delta H - T \Delta S \]

Answer 11

so actually what you can do is plug in the numbers and if delta G < 0 That means your reaction is sponataneous .

Answer 12

it is negative. because i put in -236-46

Answer 13

We start with our formula

\[\Delta G = \Delta H - T \Delta S \]

Then here is the information that we have

\[\Delta H = -236,000 J/mol\]

\[\Delta S = 46 J/mol K \]

then we plug everything in.

\[-236,000\frac{ J }{ mol } - T*46 \frac{ J }{ mol*K } \]

if you notice, we don't have any information about the temperature.

try plugging in 5130 K where temperature is.

Answer 14

OKAY hold on

Answer 15

I got -471980 and I have a feeling that's wrong :(

Answer 16

yeah it's definitely spontaneous

Answer 17

im so lost.. which one is the answer though.. D?

Answer 18

ill show you

Answer 19

Okay @Photon336

Answer 20

can I help