Which statement best rationalizes /\ssys for combustion of methane ch4(g)+2o2(g)→co2(g)+2h2o(g) a. there is a combustion reaction, so /\ssys will be a large negative number.
b. there are no changes os state and no change in nrxn so /\ssys will be small
c. combustion reactions are exothermic, so /\ssys also will be a large negative number
d. this is a combustion reaction so /\ssys will be a large positive number

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)