A student increases the temperature of a 417 cm3 balloon from 278 K to 308 K. Assuming constant pressure, what should the new volume of the balloon be? (Points : 5)

Question

anonymous · Answer

Use PV=nRT
Assuming the P and the n are constant
V/T=nR/P
You know the left part won't change, so you have to solve the equation
V/T=V'/T'

anonymous · Answer

417 cm3
       462 cm3
       924 cm3
       376 cm3

this is my answers and i chose the last one am i correct?

anonymous · Answer

How much heat do you need to raise the temperature of 100 g of aluminum from 30°C to 150°C?

     
(Points : 5)
       10.8 kJ

       10.8 × 103 kJ

       10.8 kJ

       10.8 × 103 kJ

anonymous · Answer

my answer is 10.8kj

anonymous · Answer

For the first question you're wrong, 417/278=462/308, so 462 is the right answer