Calorimetry and Specific Heat

If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?

• -80,256 J

• 80.256 J

• 80,256 J

• -80.256 J

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 0.10 J/g°C, what is the mass of the iron sample?  (show your work)

• 25g
• 30g
• 20g
• 50g

A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?

• Exothermic
• Endothermic

Tags

NGSS.HS-PS3-4

What is a tool that measures the heat of chemical reactions?

• calorimeter
•  calorie
• Styrofoam™ cup
• none of these

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

The specific heat of water is 4.18 J/g°C.

If 980. J of energy is added to 6.20 g of water at 18.0 °C, what is the final temperature of the water?

• 37.8 °C

• -19.8 °C

• 19.8 °C

• 55.8 °C

Tags

NGSS.HS-PS3-1

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

What  is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t
• Q=mc
• Q= ½mv
• m=QC

The symbol for specific heat is .......

• c
• Q
• m
• t

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

• Thermal Energy
• Specific Heat
• Temperature
• Kinetic Energy