What kind of light is a neon sign on the electromagnetic spectrum??

Neon lights get their name from the gas that some of the tubes are filled with. It is this gas that produces the color. Neon is one of a group of elements called the noble gases. Each noble gas glows a specific color when electricity is passed through it, and the gases can be mixed to create other colors.Light emitted from a neon sign is an example of excited neon gas. Millions of electrons vibrate back and forth inside the glass tub and smash into atoms, this constant bombardment and returning to the normal level emits the characteristic red light of neon.

answer: Light emitted from a neon sign is an example of excited neon gas. Millions of electrons vibrate back and forth inside the glass tub and smash into atoms, this constant bombardment and returning to the normal level emits the characteristic red light of neon.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)