At what temperature will the following reaction happen spontaneously, given that δh = 8.91×103 j/mol and δs = –219.20 j/mol·k? caso4(s) + 2hcl(g) → cacl2(s) + h2so4(l)

In order for a certain reaction to be spontaneous, the change in Gibb's free energy must be negative, that is:
dG < 0

We can calculate dG using:
dG = dH - dS

When we plug in the given values, we see that the sign of dG will never be negative; therefore, the reaction will not be spontaneous under any conditions.

The air is going to come out because of the low pressure.

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?