COMPASSLearning

Talk to us Register Login

JEE Main · 2024 · 09 Apr 2024 · Shift 1 · Chemical Thermodynamics

The heat of solution of anhydrous

CuSO_{4}

and

CuSO_{4} \cdot 5 H_{2} O

are

- 70 kJ mol^{- 1}

and

+ 12 kJ mol^{- 1}

respectively.

The heat of hydration of

CuSO_{4}

to

CuSO_{4} \cdot 5 H_{2} O

is -x kJ . The value of x is ______.

Answer: 82

Solution

Hess's law: hydration

= Δ H_{so l} (anhyd) - Δ H_{so l} (hydrate) = (- 70) - (+ 12) = - 82

kJ, so

x = 82

.

JEE Main · 2024 · 09 Apr 2024 · Shift 1 · Integer answer

Practise more: all JEE Main PYQs on Chemical Thermodynamics →

More JEE Main questions on Chemical Thermodynamics

Which of the following graphs between pressure 'P' versus volume 'V' represent the maximum work done?
JEE Main 2026View solution →
For the reaction, $N_{2} O_{4} ⇌ 2 NO_{2}$ , graph is plotted as shown below. Identify correct statements.

A. Standard free energy change for the reaction is $- 5.40 kJ mol^{- 1}$ .
B. As $Δ G^{⊖}$ in graph i …
JEE Main 2026View solution →
Use the following data:
Substance $\frac{Δ _{f} H ^{⊖} ( 500 K )}{kJ mol ^{- 1}}$ $\frac{S ^{⊖} ( 500 K )}{J K ^{- 1} mol ^{- 1}}$
| …
JEE Main 2026View solution →
Dissociation of a gas $A_{2}$ takes place according to the following chemical reactions. At equilibrium, the total pressure is 1 bar at 300 K.
$A_{2} (g) ⇌ 2 A (g)$
The standard Gibbs energy of formation of the involv …
JEE Main 2026View solution →
Consider the following data:
$Δ_{f} H^{Θ}$ (methane, g) $= - X kJ mol^{- 1}$
Enthalpy of sublimation of graphite $= Y kJ mol^{- 1}$
Dissociation enthalpy of …
JEE Main 2026View solution →
If the enthalpy of sublimation of Li is $155 kJ mol^{- 1}$ , enthalpy of dissociation of $F_{2}$ is $150 kJ mol^{- 1}$ , ionization enthalpy of Li is $520 kJ mol^{- 1}$ , electron gain enthalpy of F is $- 313 kJ mol^{- 1}$ , standard enthalpy o …
JEE Main 2026View solution →