Thermodynamics questions
1906 published questions with worked solutions.
- For the reaction, C_2H_4(g)+3O_2(g) 2CO_2(g)+2H_2O(l); U=-1415 kJ. Then H at 27°C is
- H_2(g)+ 12O_2(g) H_2O(l); H=-68 kcal. The heat change for the decomposition of 3.6 g of water is
- Equal volumes of C_2H_2 and H_2 are combusted under identical conditions. The ratio of their heat of combustion is H_2(g)+...
- Which is not characteristic of thermochemical equation?
- Given enthalpy of formation of CO_2(g) and CaO(s) are -94.0 kJ and -152 kJ respectively and the enthalpy of the reaction,...
- A gaseous reaction was carried out, first keeping the volume constant and next keeping the pressure constant. In the second...
- AB, A_2 and B_2 are diatomic molecules. If the bond enthalpies of A_2, AB and B_2 are in the ratio 1:1:0.5 and the enthalpy of...
- If 12X_2O(s) X(s)+ 14O_2(g); H=90 kJ, then the heat change during reaction of metal 'X' with one mole of O_2 to form oxide to...
- If water is formed from H^+ ions and OH^-, the heat of formation of water is
- Enthalpy of CH_4+ 12O_2 CH_3OH is negative. If the (magnitudes of the) enthalpies of combustion of CH_4 and CH_3OH are x and y...
- Which of the following is correct about the heat of combustion?
- Heat of combustion, H, for C(s), H_2(g) and CH_4(g) are -94, -68 and -213 kcal/mole then H for C(s)+2H_2(g) CH_4(g) is
- If heat of neutralisation is -13.7 kcal and H_f^0 ,H_2O=-68 kcal, then enthalpy of formation of OH^- would be
- For which change H U?
- Thermochemistry is the study of the relationship between heat energy and
- H_2(g)+Cl_2(g) 2HCl(g); H(298K) = -22.06 kcal. For this reaction, U is equal to
- From the following data, the heat of formation of Ca(OH)_2(s) at 18°C is ….. kcal: CaO(s)+H_2O(l) = Ca(OH)_2(s); H=-15.26 kcal …....
- The enthalpy of formation of ammonia gas at 298 K is -46.11 kJ ,mol^ -1 . The equation to which this value relates is
- A reaction accompanied with the absorption of energy is
- The heat evolved during neutralisation is maximum in the reaction of
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