Using charles law, i have 130 liters of gas in a piston at a temperature of 2500 c. if i cool the gas until the volume decreases to 85 liters, what will the temperature of the gas be? i got 342 so i mostly want to know if i am doing it correctly.

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.