Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 164

EASY

NEET

IMPORTANT

Earn 100

The heat of combustion of yellow phosphorus and red phosphorus are $- 9.91 K J / m o l$ and $- 8.78 K J / m o l$ respectively. The heat of transition from yellow phosphorus to red phosphorus is -

50% studentsanswered this correctly

Important Questions on Thermodynamics

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 165

For the change,

C_{d i a m o n d} \to C_{g r a p h i t e}; Δ H = - 1.89 k J,

if

6 g

of diamond and

6 g

of graphite are separately burnt to yield

C O_{2}

, the heat liberated in first case is

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 166

$2 {CO}_{(g)} + O_{2 (g)} ⟶ 2 {CO}_{2 (g)} + X kJ$

In the above equation, $X$ $kJ$ refers to:

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 167

Which of the following reactions represent

ΔH

(hydration):

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 168

ΔH

for the reaction,

I (g) + I (g) \to I_{2} (g)

will be:

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 170

The enthalpy change of a reaction does not depend on

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 173

Given,

$C (s) + O_{2} (g) ⟶ {CO}_{2} (g) + 94.2$ $kCal$

$H_{2} (g) + 1 / 2 O_{2} (g) ⟶ H_{2} O (l) + 68.3$ $kCal$

${CH}_{4} (g) + 2 O_{2} (g) ⟶ {CO}_{2} (g) + 2 H_{2} O (l) + 210.8$ $kCal$

The heat of the formation of methane $kcal$ will be:

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 178

Given that:
$Zn + 1 / 2 O_{2} \to ZnO + 84000 Cal . . . . . . (1)$

$Hg + 1 / 2 O_{2} \to HgO + 21700 Cal . . . . . . (2)$

The heat of reaction $(ΔH)$ for,

$Zn + HgO \to ZnO + Hg$ is

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 179

Given that -

$2 C (s) + 2 O_{2} (g) \to 2 {CO}_{2} (g) ΔH = - 787 kJ$

$H_{2} (g) + 1 / 2 O_{2} (g) \to H_{2} O (ℓ) ΔH = - 286 kJ$

$C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 {CO}_{2} (g) + H_{2} O (ℓ) ΔH = - 1310 kJ$

Heat of formation of acetylene is :-