Question

A student reduces the temperature of a 300 cm3 balloon from 60°C to 30°C. What will the new volume of the balloon be? (Remember to be careful with the units.)

Answer 1

300 cm3

273 cm3

150 cm3

600 cm3

Answer 2

I got 600 is this correct? @Somy (sorry girl or boy I know I'm annoying xD )

Answer 3

@Somy

Answer 4

(Remember to be careful with the units.)

Answer 5

volume is proportional to temperature so if the temp goes down then
so does the volume

Answer 6

V1/T1 = V2/T2
V unit is m3
T unit is Kelvin

Answer 7

use the formula and again make sure your units are correct

Answer 8

V1 = 300 cm3 which needs to be changed to m3
T1 = 60 °C which needs to be converted to Kelvin (you can convert it by adding 273 to Celsius value)
T2 = 30 °C needs to be converted to Kelvin also
V2 = X m3

so use the formula
your answer will be in m3
so make sure to convert it to cm3 to get the answer to match unit of options given
(p.s. dont worry, i'll help if i can :3 doesnt matter how many times, so its not annoying or anything)

Answer 9

Good work Somy but I think V2 will be in cm3

Answer 10

@alekos the formula is better to be used with its appropriate units which are Kelvin for temperature and m3 for volume
so she/he has to convert her/his cm3 value of given V1 to m3 to avoid any error
and final answer for V2 will be in m3
which then she/he can convert to cm3 and be sure there is no unit error in his/her calculation

Answer 11

OK fair enough. MKSA units are always better.

Answer 12

@Somy It doesn't actually make any difference if you know what you're doing. \(\rm 1 m^3 = 10^6 cm^3\), so you can just keep working with cubic centimeters because a cubic centimeter can directly be converted to a cubic meter.

Answer 13

i know
but thats me and you who can already do this since we have done a lot of it
but i dont know how many of these type of questions has @Daniellelovee done
which is why to be on the safe side i think its better for him/her to use SI unit system for this very equation
just to avoid error

Answer 14

i getcha. it's generally good practice to be careful.