Answer:
0.78L
Explanation:
According to Charles law, the equation below can be used to calculate the the new volume of the balloon
V1/T1 = V2/T2 .........eqn(1)
Where T1= initial temperature= 29.4°C
T,2= final temperature= 33.7°C
V2= final volume= ?
V1= initial volume= 0.68L
Making V2 the subject of formula from eqn(1)
V2=( T2 × V1)/T1
= (33.7 × 0.68)/29.4
=0.78L
Hence, the new volume of the balloon is 0.78L
