(B) The enthalpy of reaction,denoted as $\Delta_r H$,is defined as the change in enthalpy that occurs when reactants are converted into products in a

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The change in enthalpy that occurs during a chemical reaction.

(B) The enthalpy of reaction,denoted as $\Delta_r H$,is defined as the change in enthalpy that occurs when reactants are converted into products in a chemical reaction. It is calculated as the difference between the sum of the enthalpies of the products and the sum of the enthalpies of the reactants: $\Delta_r H = \sum H_{\text{products}} - \sum H_{\text{reactants}}$.

Class 11 Chemistry Thermodynamics Heat of reaction, Bond energy and Hess law

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What is enthalpy of reaction?

A
The total energy of the system.
B
The change in enthalpy that occurs during a chemical reaction.
C
The heat required to raise the temperature of a substance by $1 \ K$.
D
The energy required to break one mole of bonds.

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Thermodynamics

Subtopic

Heat of reaction, Bond energy and Hess law

When $0.5 \ g$ of sulphur is burnt to $SO_2$,$4.6 \ kJ$ of heat is liberated. What is the enthalpy of formation of sulphur dioxide in $kJ \ mol^{-1}$?

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The heat change for the reaction $H_2 + \frac{1}{2} O_2 \to H_2 O$ is called

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If the heat of formation of $CO_2$ is $-393 \ kJ/mol$,the amount of heat evolved in the formation of $0.156 \ kg$ of $CO_2$ is.....$kJ$.

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Which of the following equations correctly represents the standard heat of formation $(\Delta H_f^o)$ of methane?

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The enthalpy of neutralization of $NaOH$ by $HCl$ is $-55.84 \, kJ/mol$ and that of $NH_4OH$ by $HCl$ is $-51.34 \, kJ/mol$. The enthalpy of ionization of $NH_4OH$ is ..... $kJ/mol$.

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What is enthalpy of reaction?

Similar Questions

When $0.5 \ g$ of sulphur is burnt to $SO_2$,$4.6 \ kJ$ of heat is liberated. What is the enthalpy of formation of sulphur dioxide in $kJ \ mol^{-1}$?

The heat change for the reaction $H_2 + \frac{1}{2} O_2 \to H_2 O$ is called

If the heat of formation of $CO_2$ is $-393 \ kJ/mol$,the amount of heat evolved in the formation of $0.156 \ kg$ of $CO_2$ is.....$kJ$.

Which of the following equations correctly represents the standard heat of formation $(\Delta H_f^o)$ of methane?

The enthalpy of neutralization of $NaOH$ by $HCl$ is $-55.84 \, kJ/mol$ and that of $NH_4OH$ by $HCl$ is $-51.34 \, kJ/mol$. The enthalpy of ionization of $NH_4OH$ is ..... $kJ/mol$.

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