When a perfume bottle is opened, some liquid changes to gas and the fragrance spreads around the room. which sentence explains this?
a gases do not have a definite volume.
b the particles of gases are closely packed.
c the force of attraction between particles in gases is very high.
d gases are not matter.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)