Question

a 70 g sample of cesium is sealed in a glass vial and lowered into 250 mL of water at 90 C. when the cesium melted the temperature of the water dropped to 88.98 C

Answer 1

Answer: 70.0 g  = .53 mol  

Q = 250g (+ 1.02) 4.18

Q = 1065. 9 J / 1000 = 1.0659 kJ

1.0659/ .53 = 2.01 kJ/ mol

Answer: 2.01 kJ/ mol

Explanation:

Answer 2

Heat can be transferred from the hotter water to metal causing the metal to melt.

What is heat transfer?

The question is incomplete but I will try to give you a general overview. Now, we know that heat can be transferred from one body to another.

Hence, heat can be transferred from the hotter water to metal causing the metal to melt. When the metal melts, the system will now attain an equilibrium temperature.

Learn more about heat transfer: https://brainly.com/question/9904853