Recent questions tagged chemical-thermodynamics

For the vaporization process of HI, the molar entropy and molar enthalpy are respectively, $89.0\;J \;K^{-1}\; mol^{-1}$ and $21.16\; kJ\; mol^{-1}$. The temperature at which the value of $\Delta G$ becomes zero for this process is:

asked Jan 18, 2016 by meena.p

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A $75.0\;\text{g}$ sample of a metal is heated by adding $450\;\text{J}$ of heat. If it's temperature increases from $22 ^{\circ} \text{C}$to $37 ^{\circ} \text{C}$, what is the molar mass of the metal?

asked Mar 22, 2014 by balaji.thirumalai

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In exothermic reaction

asked Mar 14, 2014 by meena.p

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Bomb calorimeter used for determining change in internal energy at constant _____

asked Mar 14, 2014 by meena.p

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Which of the following statement is false

asked Mar 14, 2014 by meena.p

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For spontaneous reaction $\Delta G$ is

asked Mar 14, 2014 by meena.p

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During fusion, the entropy of the system

asked Mar 14, 2014 by meena.p

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At constant temperature and pressure which one of the following statements is correct for the reaction? $CO_{(g)} +\large\frac{1}{2}$$O_2 (g) \longrightarrow CO_2(g)$

asked Mar 14, 2014 by meena.p

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In a reversible adiabatic change $\Delta S$ is

asked Mar 14, 2014 by meena.p

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In which of the following process does the entropy decrease?

asked Mar 14, 2014 by meena.p

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Heat of neutralization of a strong acid and weak base is

asked Mar 14, 2014 by meena.p

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In an exothermic reaction , heat is

asked Mar 14, 2014 by meena.p

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When a gas at high pressure expands into a region of low pressure , then its temperature

asked Mar 14, 2014 by meena.p

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Two moles of an ideal gas expand spontaneously into a vaccum. The work done is

asked Mar 13, 2014 by meena.p

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The Joule-Thomson expansion of an ideal gas is an

asked Mar 13, 2014 by meena.p

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In isothermal change which of the following parameter is constant

asked Mar 13, 2014 by meena.p

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A system which can change neither matter nor energy with the surroundings is called

asked Mar 13, 2014 by meena.p

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Calculate the enthalpy change when $50\; ml$ of $0.01\; M Ca(OH)_2$ reacts with $25\; ml$ of $0.01 \;M HCl.$ Given that $\Delta H^0_{neut}$ of a strong acid and strong base is $140$ cal/ equivalent

asked Mar 13, 2014 by meena.p

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The heat of neutralization is highest in

asked Mar 13, 2014 by meena.p

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For the reaction : $C_7H_8(I)+9O_2(g) \longrightarrow 7CO_2(g) +4H_2O(I)$, the calculated heat of reaction is $232\; kJ/mol$ and observed heat of reaction is $50.4\; kJ/mol,$ then the resonance energy is

asked Mar 13, 2014 by meena.p

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A system is taken from state A to state B along two different paths 1 and 2. The Work done on the system along these two path is $W_1$ and $W_2$ The heat absorbed by the system along these paths are $Q_1$ and $Q_2$ respectively. Then

asked Mar 13, 2014 by meena.p

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The process in which heat is neither allowed to enter nor allowed to leave the system but in which temperature changes in known as

asked Mar 13, 2014 by meena.p

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Inversion Temperature is

asked Mar 13, 2014 by meena.p

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Which is equal to the total work done?

asked Mar 13, 2014 by meena.p

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For an ideal gas

asked Mar 13, 2014 by meena.p

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$100\; mL$ of $ 0.10M\; HCl$ is mixed with $100\; mL$ of $0.10M\; NaOH.$ The solution temperature rises by $6.0 ^{\circ}C.$ Calculate the enthalpy of neutralization per mole of $HCl.$

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400 \;J$. The amount of heat released $(q_1)$ at the sink is

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400\; J.$ The amount of heat absorbed $(q_2)$ by an engine at source is _________

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400\; J$. Efficiency $(\eta)$ of an ideal carnot heat engine is

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210\;$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400\; J.$ Sink $(T_1)$ and Source $(T_2)$ temperatures respectively are

asked Mar 13, 2014 by meena.p

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In an open beaker held at $27^{\circ}C$ and $1\; atm$ pressure containing dilute sulphuric acid, $100\; g$ zinc were added. The work done by the liberated gas is _______

asked Mar 13, 2014 by meena.p

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For which of the following change $\Delta H = \Delta E?$

asked Mar 13, 2014 by meena.p

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