Calorimetry Gizmo

You have 20 g of water with specific heat of 4.18 J/gŸ°C.  The temperature changes from 25° C to 20° C.  How much heat energy (Q) moves from the water to the surroundings?

• 418 Joules

• 209 J

• 83 J

• 4.18 J

Tags

NGSS.HS-PS3-4

A reaction takes place in a calorimeter. The water temperature decreased. Which way did energy flow?

• Into the system

• Into the surroundings

• Out of the system

Tags

NGSS.HS-PS3-4

How many calories are absorbed when 100 g of water increases in temperature from 20 °C to 40 °C?

• 12540 cal

• -3000 cal

• 3000 cal

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Which constant would you use for this problem, 4.18 J/g^oC or 1 cal/g ^oC? How many grams of water absorbed 4180 J when the temperature increased from 10 ^o C to 50 ^o C ?

• 4.18 J/g^oC

• 1 cal/g ^oC

Tags

NGSS.HS-PS3-4

Calculate the answer to the problem.

• 297 J

• 0.30 kJ

• 300 J

• 0.50 kJ

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

What is the specific heat of an unknown metal if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.10 °C when it is placed in a calorimeter of water. The water weighs 75.0 g and had an initial temperature of 20.00 °C?

• 0.112 J/g°C

• 0.129 J/g°C

• 1.29 J/g°C

• 0.0737 J/g°C

Tags

NGSS.HS-PS3-4

Identify the ΔT for the given problem.

• 25°C

• 175°C

• 150°C

• 200°C

Tags

NGSS.HS-PS3-1

If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ____________

• one reaches a temperature of zero Celsius

• they both have an equal temperature

• they have the same potential energy

• one reaches its phase change temperature

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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-PS1-5

Calorimeters use insulating materials like Styrofoam to

• encourage affordable materials in science experiments in schools.

• preserve the heat of the environment outside the Styrofoam cup.

• keep the liquid inside the Styrofoam cup from overheating.

• prevent energy from leaving or entering from the external environment.

Tags

NGSS.HS-PS3-4