Question

The internal energy of 4 moles of a monoatomic gas at a temperature of 77°C is

• A. 1500R
• B. 1800R
• C. 2100R
• D. 3500R

Hint:

Remember to use the formula for internal energy of a monoatomic gas: \( U = \frac{3}{2} n R T \), and always convert temperatures to Kelvin when calculating.

Answer 1

The Correct Option is C

The internal energy of an ideal monoatomic gas is given by the formula \( U = \frac{3}{2} n R T \), where \( n \) is the number of moles, \( R \) is the gas constant, and \( T \) is the temperature in Kelvin. Substituting the values yields the result of 2100R.