Question

1) A student decreases the temperature of a 417 cm³ balloon from 278 K to 231 K.Assuming constant pressure, what should the new volume of the balloon be?2) Which statement is true about a carbonated soft drink?3) For the reaction CH3 COOH→CH3 COO– + H+, which statement is true?CH3COO– is an Arrhenius base.CH3COOH is a Brønsted-Lowry base.CH3COOH is a Brønsted-Lowry acid.CH3COO– is a Lewis base.4)Which example is an exothermic reaction?dissolving sugar in watermelting icedissolving ammonium nitrate in wateriron rusting5) Of the metals Pb, Hg, Na, and Mg, which metal will not spontaneously donate electrons to copper in solution?

Answer 1

346.5cm³

Explanations:

According to Charles law, the volume of a given gas sample is directly proportional to its absolute temperature at constant pressure. Mathematically;

`\begin{gathered} v\alpha T \\ v=kT \\ k=(v_1)/(T_1)=(v_2)/(T_2)_{}_{} \end{gathered}`

where:

• v1 and v2 are the ,initial and final volume

,

• T1 and T2 are the ,initial and final temperatures ,in Kelvin

Given the following parameters

• v1 = 417 cm³

,

• T1 = 278K

,

• T2 = 231K

Substitute the given parameters into the formula to get the final volume as shown:

Hence the new volume of the balloon will be 346.5cm³