If 50 kJ of heat are removed from the substance when it is at 50oC, what will be the state and temperature of the substance?

To determine the state and temperature of the substance after removing 50 kJ of heat, we need to know the specific heat capacity, the mass of the substance, and its initial state (solid, liquid, or gas). However, since this information is not provided, we will assume a general approach.

1. Identify the initial state and temperature:

   • Initial temperature: 50°C
   • Initial state: Not specified (assume it could be either solid, liquid, or gas)

2. Calculate the heat required to change the temperature:

   • Use the formula $Q = mc\Delta T$, where:
     • $Q$ is the heat removed (50 kJ or 50,000 J)
     • $m$ is the mass of the substance
     • $c$ is the specific heat capacity
     • $\Delta T$ is the change in temperature

3. Determine the final temperature:

   • If the substance is in a single phase (solid, liquid, or gas), removing heat will lower its temperature.
   • If the substance reaches a phase change temperature (e.g., melting point or boiling point), part of the heat will be used for the phase change.

4. Consider phase changes:

   • If the substance is a liquid at 50°C and the heat removed is sufficient to reach the freezing point, the substance may start to solidify.
   • If the substance is a gas at 50°C and the heat removed is sufficient to reach the condensation point, the substance may start to condense.

Without specific details about the substance, we cannot provide an exact final state and temperature. However, the general approach involves calculating the temperature change using the specific heat capacity and considering any potential phase changes.