WILL MAKE BRAINLIEST

1. A balloon is dunked into a tank of cold water. How will this affect the size of the balloon?

A. it will shrink.

B. it will grow

2. When a sample of gas is cooled, the particles of gas .

A. slow down

B. speed up

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.