Question

How much energy is needed to raise the temperature of 40.0 g of argon from 25°C to 40°C? The specific heat capacity of argon is 0.520 J/(g·K).

Answer 1

q = mC delta T

where m is the mass (40.0 g), C is the specific heat (0.520 J/(g·K).) and delta T is the temperature difference (40C - 25C. because increments in celcius are the same as increments in K, you don't need to convert to K here)

plug in and evaluate q