Which equation shows a physical change?

pb(no3)2 (aq) + 2ki(aq) _ 2kno3(aq) + pbi2(s)

hcl(aq) + naoh(aq) _ nacl(aq) + h2o(l)

2h2o(l) _ 2h2(g) + o2(g)

h2o(g) _ h2o(s)

H2O(g) --> H2O(s)

This is the change of phase from gas to solid, which is a physical change.

The other equations correspond to chemical changes given that the origin subtances are forming different substances

This is what i found “nuclear fuel is material used in nuclear power stations to produce heat to power turbines. heat is created when nuclear fuel undergoes nuclear fission. most nuclear fuels contain heavy fissile actinide elements that are capable of undergoing and sustaining nuclear fission.” i hope this you for what your looking for. can you plz mark me brainliest?

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.