Question

A platinum resistance thermometer has resistances of 200.0 V when placed in a 0°C ice bath and 253.8 V when immersed in a crucible containing melting potassium. What is the melting point of potassium? Hint: First determine the resistance of the platinum resistance thermometer at room temperature, 20.0°C.

Answer 1

Answer: 63.26°c

Explanation:

We first find the resistance at room temperature Ro, once this is found, we plug in the Ro, value into our normal equation to obtain the temperature at which the potassium melts. We must know the value of the temperature coefficient of resistance (alpha) which I have provided in the solution.