For the following systems at equilibrium C:D:CaCO3(s)PCl3(g)+Cl2(g)⇌⇌CaO(s)+ CO2(g)PCl5(g)ΔH=+178 kJ/molΔH=−88 kJ/molC:CaCO3(s)⇌CaO(s)+CO2(g)ΔH=+1 78 kJ/molD:PCl3(g)+Cl2(g)⇌PCl5(g)ΔH=−8 8 kJ/mol classify these changes by their effect.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

so what is the problem with your lab report and whats the subject of the lab report? i will you

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )