Calorimetry Concept

For the formula:

Q= m c ∆T

The units for specific heat are:

• kg /J C

• °C/g J

• kJ/g

• J/kg°C

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down
• They would stop moving
• They would speed up
• There would be no effect

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-2

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

• one reaches a temperature of zero
• they both have an equal temperature
• one runs out of energy

Tags

NGSS.HS-PS3-4

A sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 100 J/kg°C, what is the mass of the iron sample? (show your work)

• 25g

• 30g

• 20g

• 50g

Calorimetry Question:

A piece of metal with a mass of 32.8 g is heated to 100.5°C and dropped into 138.2 g of water at 20.0°C. The final temperature of the system is 30.2°C. What is the specific heat capacity of the metal? (show your work). Use 4180J/kg°C for specific heat capacity of water.

• 2555.4 J/kg°C

• 3910 J/kg°C

• 255.29 J/kg°C

• 350 J/kg°C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Calorimeters use insulating materials to:

• encourage affordable materials in science experiments in schools.
• preserve the heat of the environment outside the Styrofoam cup.
• prevent heat from escaping to the environment.
• keep the liquid inside the Styrofoam cup from overheating.

Tags

NGSS.HS-PS3-4

A metal cube at temperature of 10°C immersed in a liquid at temperature of 70°C.
What is the temperature of the metal cube when thermal equilibrium is achieved between the cube and the liquid?

• Between 10°C and 70°C
• More than 70°C
• Less than 10°C
• Same as the room temperature

Tags

NGSS.HS-PS3-4