Question:
The first law of thermodynamics can be stated as
The first law of thermodynamics can be stated as
Show Hint
$\Delta U = q + w$. For an isolated system, $q=0$ and $w=0$, so $\Delta U=0$.
Updated On: Apr 27, 2026
- the energy of an open system only is constant.
- the energy of isolated and open systems is constant.
- the energy of closed and open systems is constant.
- the energy of an isolated system only is constant.
- the energy of a closed system only is constant.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Concept
The First Law of Thermodynamics is the law of conservation of energy.
Step 2: Meaning
Energy can neither be created nor destroyed; it can only be transformed.
Step 3: Analysis
In an isolated system, there is no exchange of mass or energy with the surroundings, so total energy remains constant.
Step 4: Conclusion
Hence, correct answer is (D).
Final Answer: (D)
The First Law of Thermodynamics is the law of conservation of energy.
Step 2: Meaning
Energy can neither be created nor destroyed; it can only be transformed.
Step 3: Analysis
In an isolated system, there is no exchange of mass or energy with the surroundings, so total energy remains constant.
Step 4: Conclusion
Hence, correct answer is (D).
Final Answer: (D)
Was this answer helpful?
0
0
Top KEAM Chemistry Questions
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
- $4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :
- Green chemistry deals with
- Neopentyl bromide undergoes dehydrohalogenation to give alkenes even though it has no $\beta$- hydrogen. This is due to
- Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
View More Questions
Top KEAM Work done in Thermodynamics Questions
- In the reaction \( \frac{3}{2}O_2(g) \rightarrow O_3(g) \), the value of \( \Delta_r G^\circ \) at \( 298\,K \) is approximately ( \( K_p = 10^{-30},\ 2.303RT = 5.7\,\text{kJ mol}^{-1} \) )
- \( \Delta G \) for \( 3\text{X}_{(g)} + 2\text{Y}_{(g)} \rightarrow 3\text{Z}_{(g)} \) at 293 K is
( \( \Delta H^\circ = -13\,\text{kJ mol}^{-1} \), \( \Delta S^\circ = -45\,\text{J mol}^{-1}\text{K}^{-1} \) ) - An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done is [1 bar = 100 J]}
- Enthalpy change is always negative for which one of the following processes?
- What are the thermodynamic conditions for a reaction to be spontaneous at low temperature and non-spontaneous at high temperature?
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions