Question

1. what are the conditions used to determine the standard state of an element?

a. 100 degrees c
b. 0 degrees c
c. 25 degrees c

1. what state or phase is the most common standard state of the elements?

a. solid
b. liquid
c. gas
d. plasma
... get so hot they become liquid?

Explanation:

Question 7

The standard state of an element is typically defined at a temperature of 25°C (298.15 K) and a pressure of 1 atm (or 1 bar). Option a (100°C) is the boiling point of water, not the standard temperature. Option b (0°C) is the freezing point of water, also not the standard temperature for standard state definition. So the correct option is c.

Most elements are solid in their standard state at 25°C and 1 atm pressure. For example, metals like iron, copper, non - metals like carbon (graphite) are solid. Only a few elements like mercury (liquid) and noble gases, oxygen, nitrogen (gases) are in non - solid states in their standard state. Plasma is not the standard state for most elements as it requires very high energy conditions. So the most common standard state is solid.

Answer:

c. 25 degrees C

Question 8