Select the statements below that are false, and then think about why they are not true. A chemical reaction is spontaneous if

it is exothermic.

the Δuniv is positive.

the Δ is positive.

the products are lower in energy than the reactants.
A chemical reaction is not spontaneous if

it never goes to completion.

the Δuniv is negative.

work is required to make it go.

the Δreaction is negative.

Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o