One kg of graphite is burnt in a closed vessel. The same amount of graphite is burnt in an oepn vessel. Will the heat evolved in the two cases be the same ? If not, in which case it would be greater?

One kilogram of graphite is burnt in a closed vessel.The same amount of graphite is burnt in an open vessel.Will the heat evolved in two cases be same or different?

A given mass of an ideal gas is heated in a vessel. The same amount of gas is then heated by keeping it in a larger vessel. Assume that the volumes of both vessel remain the same during heating. What will be the nature of the pressure temperature (p-T) graphs in the two cases.

If mercury is kept in a glass vessel and in a copper vessel separately, will the coefficient of apparent expansion in both cases be the same ? If not, in which case will it be greater ? Coefficients of volume expansion of glass and copper are 25 times 10^(-6@)C^(-1) " and " 50 times 10^(-6@)C^(-1) respectively.

Do all fuels produce same amount of heat when they are burnt?

1.0 g of Mg is burnt with 0.28 g of O_2 in a closed vessel . Which reactant is left in excess and how much ?

1.0 g of magnesium is burnt with 0.56 g O_2 in a closed vessel.Which reactant is left in excess and how much ?