Enthalpy of combustion of carbon to carbon dioxide is $$-390.0~\text{kJ mol}^{-1}.$$ The amount of heat released when $$35.0~\text{g}$$ of $$\mathrm{CO_2}$$ is formed from the reaction of carbon and dioxygen gas, is:

1. $$310~\text{kJ}$$
2. $$490~\text{kJ}$$
3. $$245~\text{kJ}$$
4. $$700~\text{kJ}$$
Subtopic:  Enthalpy & Internal energy |
72%
From NCERT
NEET - 2024
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For the following reaction at 300K
$$\mathrm{A}_2(\mathrm{~g})+3 \mathrm{~B}_2(\mathrm{~g}) \rightarrow 2 \mathrm{AB}_3(\mathrm{~g})$$
the enthalpy change is +15 kJ, then the internal energy change is:

1. 19988.4 J
2. 200 J
3. 1999 J
4. 1.9988 kJ
Subtopic:  Enthalpy & Internal energy |
73%
From NCERT
NEET - 2024
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What is the correct relationship between changes in enthalpy and internal energy within the following options?
1. $$\Delta \mathrm{H}+\Delta \mathrm{U}=\Delta \mathrm{nR}$$
2. $$\Delta \mathrm{H}=\Delta \mathrm{U -\Delta n_gRT}$$
3. $$\Delta \mathrm{H}=\Delta \mathrm{U+\Delta n_gRT }$$
4. $$\Delta \mathrm{H} -\Delta \mathrm{U=-\Delta n_gRT}$$
Subtopic:  Enthalpy & Internal energy |
80%
From NCERT
NEET - 2023
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For the reaction, 2Cl(g) $\to$ Cl2(g), the correct option is:

1.

2.

3.

4.

Subtopic:  Enthalpy & Internal energy | Spontaneity & Entropy |
60%
From NCERT
NEET - 2020
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