You visited us 1 times! Enjoying our articles? Unlock Full Access!

Spontaneity

Which of the ...

Question

Which of the natural process is spontaneous?

Formation of curd from milk after doing initiation

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Convesion of

C (g r a p h i t e) \to C (d i a m o n d)

25^{0}

C and

1

atm

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Formation of

H_{2}

(g) and

O_{2}

(g) from

H_{2} O

(l)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Formation of

C r O_{5}

from

H_{2} O_{2}

and

K_{2} C r_{2} O_{7}

in basic medium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Formation of curd from milk after doing initiation
(A) The curd forms from milk because of the chemical reaction between the lactic acid, bacteria and casein. During fermentation, the bacteria uses enzymes to produce energy $(A T P)$ from lactose. This is spontaneous.
(B) $C (g r a p h i t e) \to C (d i a m o n d)$ at $25^{o} C$ and $1 a t m$ . It is not spontaneous. It needs a $150000$ times positive atmospheric pressure at Earth's surface to do so.
(C) It is not spontaneous. Only electric discharge can convert ${H_{2}}_{(g)}$ and ${O_{2}}_{(g)}$ to ${H_{2} O}_{(l)}$ .
(D) It is not sponatneous. Acidified solution of $K_{2} C r_{2} O_{7}$ reacts with $H_{2} O_{2}$ to form $C r O_{5}$ .
$C r_{2} O_{7}^{2 -} + 2 H^{+} + H_{2} O_{2} ⟶ C r O_{5} + 5 H_{2} O$

Suggest Corrections

Similar questions

C_{D i a m o n d} + O_{2} \to C O_{2} (g); Δ H = - 94.3 k c a l

C_{G r a p h i t e} + O_{2} \to C O_{2} (g); Δ H = - 97.6 k c a l

C_{d i a m o n d} \to C_{g r a p h i t e}

C_{d i a m o n d} \to C_{(g r a p h i t e)}

(i n k c a l)

C_{(d i o m o n d)} + O_{2} (g) \to C O_{2} (g) . . . (i) (Δ H = - 94.5 k c a l) C_{(g r a p h i t e)} + O_{2} (g) \to C O_{2} (g) . . . (i i) (Δ H = - 94.0 k c a l)

Calculate $Δ H$ for $C_{(g r a p h i t e)} \to C_{d i a m o n d}$ from the following data:

i) $C (g r a p h i t e) + O_{2} \to C O_{2} (g), Δ H = - 94 K c a l$

ii) $C (d i a m o n d) + O_{2} \to C O_{2} (g), Δ H = - 68 K c a l$

C (d i a m o n d) + O_{2} \to C O_{2}; △ H = - 395 k J

C (g r a p h i t e) + O_{2} \to C O_{2}; △ H = - 393 k J

O_{2}

H_{2}

g

O_{2}

g

H_{2}

Join BYJU'S Learning Program