Advertisements
Advertisements
Question
Predict the feasibility of a reaction when ΔH decreases but ΔS increases.
Solution
When ∆H decreases but ∆S increases, the reaction is feasible.
APPEARS IN
RELATED QUESTIONS
The amount of heat exchanged with the surrounding at constant pressure is given by the quantity
C(diamond) → C(graphite), ∆H = –ve, this indicates that
The enthalpies of the formation of Al2O3 and Cr2O3 are – 1596 kJ and – 1134 kJ, respectively. ∆H for the reaction \[\ce{2Al + Cr2O3 -> 2Cr + Al2O3}\] is
The value of ∆H for cooling 2 moles of an ideal monatomic gas from 125°C to 25°C at constant pressure will be `["given C"_"P" = 5/2"R"]`
Given that \[\ce{C_{(g)} + O2_{(g)} -> CO2_{(g)}}\] ∆H° = – a kJ; \[\ce{2CO_{(g)} + O2_{(g)} -> 2CO2_{(g)}}\] ∆H° = – b kJ; Calculate the ∆H° for the reaction \[\ce{C_{(g)} + 1/2O2_{(g)} -> CO_{(g)}}\]
Predict the feasibility of a reaction when both ΔH and ΔS positive.
Predict the feasibility of a reaction when both ΔH and ΔS negative.
Define the calorific value of food.
What is the unit of calorific value?
In a constant volume calorimeter, 3.5 g of gas with molecular weight 28 was burnt in excess oxygen at 298 K. The temperature of the calorimeter was found to increase from 298 K to 298.45 K due to the combustion process. Given that the calorimeter constant is 2.5 kJ K−1. Calculate the enthalpy of combustion of the gas in kJ mol−1.