(C) The enthalpy change is given by the formula: $\Delta H = \Delta U + \Delta (PV)$ Substituting $\Delta (PV) = P_2 V_2 - P_1 V_1$: $\Delta H = \Delt

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(C) The enthalpy change is given by the formula: $\Delta H = \Delta U + \Delta (PV)$ Substituting $\Delta (PV) = P_2 V_2 - P_1 V_1$: $\Delta H = \Delta U + (P_2 V_2 - P_1 V_1)$ Given $\Delta U = 30.0 \, \text{L} \cdot \text{atm}$,$P_1 = 2.0 \, \text{atm}$,$V_1 = 3.0 \, \text{L}$,$P_2 = 4.0 \, \text{atm}$,and $V_2 = 5.0 \, \text{L}$: $\Delta H = 30.0 + (4.0 \times 5.0 - 2.0 \times 3.0)$ $\Delta H = 30.0 + (20.0 - 6.0) = 30.0 + 14.0 = 44.0 \, \text{L} \cdot \text{atm}$.

Class 11 Chemistry Thermodynamics Basic concepts

Easy

For a change in state of $1 \, \text{mole}$ of a non-ideal gas,the change in internal energy is $\Delta U = 30.0 \, \text{L} \cdot \text{atm}$. The state changes from $(2.0 \, \text{atm}, 3.0 \, \text{L}, 95 \, \text{K})$ to $(4.0 \, \text{atm}, 5.0 \, \text{L}, 245 \, \text{K})$. What is the change in enthalpy $(\Delta H)$ in $\text{L} \cdot \text{atm}$?

A
$40$
B
$42.3$
C
$44$
D
Cannot be determined because pressure is not constant.

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When a solvent is added to a solution,the heat of the solution $...$.

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The heat of combustion of ethanol in a bomb calorimeter at $25\,^oC$ is $-670.48\, K\,cal\, mol^{-1}$. Find the value of $\Delta U$ in $K\,cal$ for the reaction at $25\,^oC$.

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Fill in the blanks:
$(i)$ The change in heat energy during a chemical reaction at constant volume is called .......
$(ii)$ During a ....... process,there is no absorption or evolution of heat.
$(iii)$ The equation $\Delta G = \Delta H - T \Delta S$ was proposed by .......

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Calculate the final temperature of a monoatomic ideal gas that is compressed reversibly and adiabatically from $16 \, L$ to $2 \, L$ at $300 \, K$. (in $, K$)

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For an endothermic process,$\Delta H$ will be ...... .

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When a solvent is added to a solution,the heat of the solution $...$.

The heat of combustion of ethanol in a bomb calorimeter at $25\,^oC$ is $-670.48\, K\,cal\, mol^{-1}$. Find the value of $\Delta U$ in $K\,cal$ for the reaction at $25\,^oC$.

Fill in the blanks:$(i)$ The change in heat energy during a chemical reaction at constant volume is called .......$(ii)$ During a ....... process,there is no absorption or evolution of heat.$(iii)$ The equation $\Delta G = \Delta H - T \Delta S$ was proposed by .......

Calculate the final temperature of a monoatomic ideal gas that is compressed reversibly and adiabatically from $16 \, L$ to $2 \, L$ at $300 \, K$. (in $, K$)

For an endothermic process,$\Delta H$ will be ...... .

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Fill in the blanks:
$(i)$ The change in heat energy during a chemical reaction at constant volume is called .......
$(ii)$ During a ....... process,there is no absorption or evolution of heat.
$(iii)$ The equation $\Delta G = \Delta H - T \Delta S$ was proposed by .......