HELP A MENTALLY DRAINED CHEM STUDENT PLEASEEE A cylinder contains a nmixture of gases under constant atmosphcric pressure. The gases undergo a chemical rcaction. Upon reacting, the gases absorb 877 J of heat from the surroundings and the surroundings do 0.248 U of P work on the gases. What is the value of ∆H in joules for this process?
∆H= ? J

what is the value of ∆E in joules for this process?

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.