Phase and Specific Heat

What is the change in temperature when 50,000 Joules of energy is added to 200 grams of water at 25 C?

• 0.016 C
• 1,500 C
• 63 C
• 0.4 C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?

• 1400 J
• 2800 J
• 210,000 J
• 1,400,000 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Which of the following pictures shows a piece of ice being heated from -2 C to 25 C?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-4

Which of the following shows a tray of water being put in the freezer?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Water exists as a _____________ at 700 mmHg and 50 °C.

• solid
• liquid
• gas
• supercritical fluid

Tags

NGSS.MS-PS1-4

What phase change(s) may occur at pressures below 4.58 mmHg?

• sublimation/deposition
• melting/freezing
• all phase changes are possible at these pressures
• vaporization/condensation

Tags

NGSS.MS-PS1-4

The pressure is increased on a sample of water at 0 °C from 0 mmHg to 800 mmHg.  In order, what changes occur?

• deposition, melting
• sublimation, melting
• condensation, freezing
• deposition, freezing

Tags

NGSS.MS-PS1-2

What is true regarding CO₂ for temperatures above 31 °C?

• It can never be liquified.
• It decomposes.
• It has a high pressure.
• It is a plasma.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

At 10 atm, dry ice is heated from -100 °C to 30 °C.  What changes occur?

• freezing, then condensation
• melting only
• sublimation only
• melting, then boiling

Tags

NGSS.MS-PS1-4

What is the normal boiling point of CO₂?

• -78.5 °C
• -56.7 °C
• 31 °C
• It doesn't have a normal boiling point.

Tags

NGSS.MS-PS1-4