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Questions >> JEEMAIN and NEET >> Chemistry >> Chemical Thermodynamics

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

answered Apr 17, 2019 by amanbiruli10

1 answer

How to solve this question

answered Feb 25, 2018 by drnmishra

1 answer

Dissolution of gases in water is

answered Feb 21, 2018 by meena.p

2 answers

10 moles of an ideal gas expands into vacuum. The work done is

answered Feb 21, 2018 by meena.p

2 answers

For the following thermodynamic process Dry ice $\longrightarrow CO_2$ (g)

answered Feb 21, 2018 by meena.p

2 answers

Enthalpy =

answered Jan 29, 2018 by sharmaaparna1

2 answers

The source of energy in a cellular reaction is

answered Jan 23, 2018 by meena.p

2 answers

According to third law of thermodynamics, the entropy at 0 K is zero for

answered Jan 23, 2018 by meena.p

2 answers

Cooking is fast in a pressure cooker because

answered Jan 18, 2018 by priyanka.c

2 answers

The value of $\Delta S$ is negative in which of the following process?

answered Jan 18, 2018 by priyanka.c

2 answers

The enthalpy of sublimation of iodine is 62.8 kJ/mol. The bond dissociation energies for $Cl_2, I_2$ and ICl are 242.3, 151.0 and 211.3 kJ/mol, respectively. The standard enthalpy of formation of ICl(g) is nearly equal to

answered Sep 19, 2017 by neerajjangra1978

1 answer

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:

answered Jan 18, 2016 by meena.p

1 answer

why ΔH = energy used in bond breaking reactions − energy released in bond making products and not ΔH = energy released in bond making products - energy used in bond breaking reactions .

answered Jan 21, 2015 by sharmaaparna1

1 answer

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?

answered Mar 22, 2014 by balaji.thirumalai

1 answer

In exothermic reaction

answered Mar 14, 2014 by meena.p

1 answer

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

answered Mar 14, 2014 by meena.p

1 answer

Which of the following statement is false

answered Mar 14, 2014 by meena.p

1 answer

For spontaneous reaction $\Delta G$ is

answered Mar 14, 2014 by meena.p

1 answer

During fusion, the entropy of the system

answered Mar 14, 2014 by meena.p

1 answer

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

answered Mar 14, 2014 by meena.p

1 answer

In a reversible adiabatic change $\Delta S$ is

answered Mar 14, 2014 by meena.p

1 answer

In which of the following process does the entropy decrease?

answered Mar 14, 2014 by meena.p

1 answer

Heat of neutralization of a strong acid and weak base is

answered Mar 14, 2014 by meena.p

1 answer

In an exothermic reaction , heat is

answered Mar 14, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

The Joule-Thomson expansion of an ideal gas is an

answered Mar 13, 2014 by meena.p

1 answer

In isothermal change which of the following parameter is constant

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

The heat of neutralization is highest in

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

Inversion Temperature is

answered Mar 13, 2014 by meena.p

1 answer

Which is equal to the total work done?

answered Mar 13, 2014 by meena.p

1 answer

For an ideal gas

answered Mar 13, 2014 by meena.p

1 answer

$100\; mL$ 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 $HCl.$

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

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 _________

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

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 _______

answered Mar 13, 2014 by meena.p

1 answer

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

answered Mar 13, 2014 by meena.p

1 answer

The following equation shows the conversion of limes stone to lime $CaCO_3(s)\longrightarrow CaO(s) + CO_2(g)$ . The values of $\Delta H^\circ$ and $\Delta S^\circ$ are $+179.1\; kJ$ and $160.2\; J/K$ respectively at $298\; K$ and $1\; bar$ . Assuming that $\Delta H^\circ$ and $\Delta S^\circ$ do not change with temperature, minimum temperature above which conversion of lime stone to lime will be spontaneous is

answered Feb 28, 2014 by mosymeow_1

1 answer

Conversion of A to B is carried out by the following process: $\Delta S(A\rightarrow C)=50eV, \Delta S(C\rightarrow B)=30eV, \Delta S(B\rightarrow D) = 20 eV$ , where eV, where eV, is entropy unit, then $\Delta S(A\rightarrow B)$ is

answered Feb 28, 2014 by mosymeow_1

1 answer

The enthalpy of hydrogenation of cyclohexene is -119.5 kj/mol. What is the enthalpy of benzene, if its resonance energy is -150.4 kJ/mol?

answered Feb 28, 2014 by mosymeow_1

1 answer

For the formation of carbon monoxide (CO) from the elements at 298 K $(\Delta H - \Delta U)$ is (R=8.314 $JK^{-1}mol^{-1}$ )

answered Feb 28, 2014 by mosymeow_1

1 answer

Given, standard enthalpy of formation $(\Delta _f H^\circ)$ at 298 k for methane is -74.8 kJ/mol. What other information is required to determine the average energy for C-H bond formation would be

answered Feb 28, 2014 by mosymeow_1

1 answer

One mole of monoatomic ideal gas at T (K) is expanded from 1 L to 2 L adiabitcally under constant external pressure of 1 atm. The final temperature of gas in kelvin is

answered Feb 28, 2014 by mosymeow_1

1 answer

The enthalpy of vaporisation of a liquid is 30 kJ/mol and entropy of vaporisation is 75 $Jmol^{-1}K^{-1}$ . What is the boiling point of the liquid at 1 atm?

answered Feb 28, 2014 by mosymeow_1

1 answer

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