The volume of a gas collected when the temperature is 20.0°C and the pressure is 720 mm Hg
measures 0.0228 L. What is the calculated volume of the gas at 28.0°C and 780 mm Hg?

Explanation:

We can use the Combined Gas Laws to solve this problem

Data

p₁ = 720 Torr;  V₁ = 0.0228 L; T₁ = 20.0 °C  

p₂ = 780 Torr; V₂ = ?;              T₂ = 28.0 °C

Calculations

(a) Convert the temperatures to kelvins

T₁ = (20.0 + 273.15) K = 293.15 K

T₂ = (28.0 + 273.15) K = 301.15 K

(b) Calculate the new volume

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current