m=20g co t=127°c u=?

To find the internal energy (u) of a substance, you typically require more information, such as the specific heat capacity of the substance, its mass, and the temperature change it has undergone.

Assuming you're looking for the internal energy change (Δu) of a substance with mass \( m \) going through a temperature change, we can use the formula:

\[ \Delta u = mc\Delta T \]

where:

• \( m \) is the mass (in kilograms),
• \( c \) is the specific heat capacity of the substance (in J/(kg·°C)),
• \( \Delta T \) is the change in temperature (in °C).

If you have the specific heat capacity (c) and the initial temperature (or final temperature) to compare with, you can calculate the internal energy change.

Given:

• Mass, \( m = 20 \, \text{g} = 0.020 \, \text{kg} \)
• Temperature, \( t = 127 \, °C \) (but we need to know a reference or initial temperature to determine ΔT)

Please provide the specific heat capacity of the material and the initial temperature, and I'd be happy to assist further!