Calculate the heat needed to change 2.50 x 10 2 grams of ice at 0.0°C to steam at 100.0 °C. How much heat is removed from 60.0 g of steam at 100.0°C to change it to 60.0 g of water at 20.0 °C

Does anyone know how I would go about solving either of these problems?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3