What is the molar enthalpy of reaction for synthesis of PCl5(s) from phosphorus and chlorine? 2P(s) + 5Cl2(g) → 2PCl5(s)

2P(s) + 3Cl2(g) → 2PCl3(s) ΔH = −574 kJ

2PCl5(s) → 2 PCl3(s) + 2Cl2(g) ΔH = +157 kJ

(a) 366 kJ (b) 417 kJ (c) 444 kJ (d) 888 kJ

lol idk man i guess u gotta ask bill nye the science guy

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

pv=nrt

explanation:

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied