PLEASE ANSWER FAST.Which of the four circuits shows the best way to light up the light bulbs? Pls tell me if I got the answer right, and if not pls tell me my error and give me the right answer.

first one

coz buld have two wires and it is connected with

battery

2nd one

3rd and 4th circuits are not complete and in the 1st one wires connected to each bulb are connected to the same terminal of the battery. So there is no potential difference between the 2 ends of wire so the bulbs don't light up. For it to be correct one end of wire should be connected to positive terminal and the other one to the negative terminal

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.

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >