Which among the following reactions exhibits | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The relationship between enthalpy change $(\Delta H)$ and internal energy change $(\Delta U)$ is given by the equation: $\Delta H = \Delta U + \De

Vedclass · Accepted Answer

$H_{2(g)} + Br_{2(g)} \rightarrow 2 HBr_{(g)}$

Vedclass · Answer

(A) The relationship between enthalpy change $(\Delta H)$ and internal energy change $(\Delta U)$ is given by the equation: $\Delta H = \Delta U + \Delta n_g RT$. For $\Delta H = \Delta U$ to hold true,the term $\Delta n_g$ must be equal to $0$. $\Delta n_g$ is defined as the difference between the sum of stoichiometric coefficients of gaseous products and gaseous reactants. For option $A$: $H_{2(g)} + Br_{2(g)} \rightarrow 2 HBr_{(g)}$,$\Delta n_g = 2 - (1 + 1) = 0$. Since $\Delta n_g = 0$,the condition $\Delta H = \Delta U$ is satisfied.

Which among the following reactions exhibits $\Delta H = \Delta U$?

Similar Questions

If $65 \ kJ$ of work is done on the system and it releases $25 \ kJ$ of heat,what is the change in internal energy of the system (in $kJ$)?

$A$ gas is allowed to expand in an insulated container against a constant external pressure of $2.5 \ bar$ from $4.5 \ dm^3$ to $7 \times 10^{-3} \ m^3$. What is the change in internal energy of the gas (in $J$)?

$A$ cup of water at $5^{\circ}C$ (system) is placed in a microwave oven and the oven is turned on for one minute, during which the water begins to boil. Which of the following options is true?

Consider the reaction at $298 \ K$:
$H_{2(g)} + Cl_{2(g)} \to 2HCl_{(g)}, \Delta H^o = -185 \ kJ$
What is $\Delta U^o$ for this reaction? .....$kJ$

Three moles of an ideal gas are compressed isothermally from $60 \ L$ to $20 \ L$ using a constant external pressure of $5 \ atm$. The heat exchange $Q$ for the compression is $....... \ L \cdot atm$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module