A sealed balloon is filled with 1.30 L of helium at 17°C and 1.03 atm. The balloon rises to a point in the atmosphere where the pressure is 225 torr and the temperature is −31 °C. What is the change in the volume of the balloon as it ascends from 1.03 atm to a pressure of 225 torr?

ΔV=2.481 L

Explanation:

As we know that

Always use temperature in Kelvin and Pressure in Atm

Given Data

P₁=1.03 atm

P₂=225 torr =(225/760)=0.296 atm

V₁=1.30

T=17⁰C=290.15 K

T₂=-31⁰C=242.15 K

Substitute the given values

So

You have to find the difference of two volumes:

So

ΔV=3.781 - 1.30

ΔV=2.481 L

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.