During complete combustion of one mole of butane, 2658 kJ of heat is released. The thermochemical reaction for this change is -
1.
2.
3.
4.
of formation of at certain temperature is . The value of is-
1. Zero
2.
3.
4. Equal to
Consider the reactions given below. On the basis of these reactions find out which of the
the algebraic relationships is correct?
1. | x=y | 2. | x=2y |
3. | x>y | 4. | x<y |
In an exothermic reaction, heat is evolved, and the system loses heat to the surrounding. The correct choice among the following for such a system are-
(a) qp will be negative
(b) will be negative
(c) qp will be positive
(d) will be positive
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)