A balloon is inflated with helium to a volume of 4.6L at 23.0 oC. If you leave it in a hot car, what volume will it be at 115 oF?

(a) 4.3 L

(b) 5.0 L

(c) 9.2 L

(d) 2.3 L

B

Explanation:

V1 = 4.6L

T1 = 23°C = (23 + 273.15)K = 296.15

T2 = 115°F = (115 + 225.928)K = 340.928K

V2 = ?

To solve this question, we need to use Charles law which states that the volume of a fixed mass of mass is directly proportional to its temperature provided that the pressure remains constant.

Mathematically,

V = kT, k = V / T

V1 / T1 = V2 / T2 = V3 / T3 ==Vn / Tn

V1 / T1 = V2 / T2

Solve for V2

V2 = (V1 × T2) / T1

V2 = (4.6 × 340.928) / 296.15

V2 = 5.2L

The final of the gas is approximately 5.0L

(b) 5.0 L

Explanation:

Hello,

In this case, by using the Charles' law which help us to understand the volume-temperature relationship as a directly proportional relationship, we must compute it in absolute temperatures:

We can easily compute the final volume by:

Thereby, answer is (b) 5.0 L

Regards.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.