Can someone please help me it’s not hard I just need to get it done now!!

The Chinese created black powder roughly 1000 years ago. It's a 75:15:10 mix of potassium nitrate (saltpeter), charcoal, and sulfur. Black powder is contained in a tube around a fuse in basic firework rockets. When lighted, more sophisticated fireworks shells are fired from a mortar containing black powder, which generates a lift-off response.

Distinct metals are mixed to generate different colors in fireworks. The difference between incandescence and luminescence is that incandescence is light created by heat and luminescence is light produced by other sources. Pure components are required for any type of light since traces of other chemicals will cloud the hue. Copper chloride produces a blue tint, while barium chloride produces a luminous green color.

air quality

poor drinking water

and heavy polution

can lead to poor health

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.