Chemistry questions
29404 published questions with worked solutions.
- A sample of gas absorbs 4000 kJ of heat and surrounding does 2000 J of work on sample. What is the value of U? [MHTCET 2020]
- If 38.55 kJ of heat is absorbed, when 6.0 g of O_2 react with ClF according to the reaction 2ClF(g) + O_2(g) Cl_2(g) + OF_2(g)...
- An ideal gas expands isothermally and reversibly from 10 m^3 to 20 m^3 at 300 K, performing 5.187 kJ of work on surrounding,...
- For the reaction, N_2(g) + 3H_2(g) 2NH_3(g) ; H is equal to [MHTCET 2021]
- When 6.0 g of graphite reacts with dihydrogen to give methane gas, 37.4 kJ of heat is liberated. What is standard enthalpy of...
- Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27^ ?...
- Identify the equation in which change in enthalpy is equal to change in internal energy [MHTCET 2022]
- Two moles of an ideal gas is expanded isothermally and reversibly at 300 K from 1 L to 10 L. The enthalpy change in kJ is [MHTCET...
- If C(s) + O_2(g) CO_2(g) , H = -X, CO(g) + 1 2 O_2(g) CO_2(g) , H = -Y, Calculate _f H for CO(g) formation [MHTCET 2019]
- Based on first law of thermodynamics which of the following is correct [MHTCET 2019]
- Which among the following equations represents the first law of thermodynamics under isobaric conditions? [MHTCET 2018]
- Calculate the work done during combustion of 0.138 kg of ethanol, C_2H_5OH(l) at 300 K. Given: R = 8.314 J ,K^ -1 , molar mass of...
- The work done during combustion of 9 10^ -2 kg of ethane, C_2H_6(g) at 300 K is (Given R = 8.314 J ,deg^ -1 ,mol^ -1 , atomic...
- The first law of thermodynamics for isothermal process is [MHTCET 2017]
- Mathematical equation of first law of thermodynamics for isochoric process is [MHTCET 2016]
- What is the amount of work done when 0.5 mole of methane, CH_4(g) , is subjected to combustion at 300 K? (Given, R = 8.314 J ,K^...
- Assuming enthalpy of combustion of hydrogen at 273 K is -286 kJ and enthalpy of fusion of ice at the same temperature to be +6.0...
- The heat of neutralisation of a strong acid and a strong alkali is 57.0 kJ ,mol^ -1 . The heat released when 0.5 mole of HNO_3...
- According to Hess's law, the heat of reaction depends upon [MHTCET 2011]
- The heat of combustion of carbon is -393.5 kJ/mol . The heat released upon the formation of 35.2 g of CO_2 from, carbon and...