Q1
The measure of disorder or randomness of a system is called:
📝 SolutionEntropy ($S$) is the thermodynamic measure of the degree of disorder or randomness in a system.
Q2
For an endothermic reaction, $\Delta H$ is:
📝 SolutionIn an endothermic reaction heat is absorbed, so products have higher enthalpy, making $\Delta H$ positive.
Q3
A process carried out with no heat exchange with the surroundings is called:
📝 SolutionAn adiabatic process is one in which no heat is exchanged between the system and surroundings ($q = 0$).
Q4
The first law of thermodynamics is expressed as:
📝 SolutionThe first law states $\Delta U = q + w$, where $q$ is heat added to the system and $w$ is work done on the system.
Q5
A process carried out at constant temperature is called:
📝 SolutionAn isothermal process occurs at constant temperature ($\Delta T = 0$).
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Class 11 · Chemistry
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