Which state of matter has a definite volume, but does not have a definite shape? (2 points)
a. solid
b. liquid
c. gas
d. plasma

b. liquid

Explanation:

Solid state : It is a state in which the particles are closely packed and does not have any space between them. This state has a definite shape and a definite volume.

Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state has a definite volume but does not have a fixed shape.

Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them. This state has indefinite volume as well as a definite shape.

Plasma state: It is a ionized state in which the particles are loosely arranged and have a lot of space between them. This state has indefinite volume as well as a definite shape.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol