Calorimetry

The video indicates that the specific heat is given by the symbol "s". However, we use the symbol "c" for specific heat. Which of the following equations is the equation we will use for specific heat?

• q = mcΔV

• q = mcΔP

• q = mcΔE

• q = mcΔT

A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of  0.10 J/g°C, what is the mass of the iron sample?

• 25 g

• 30 g

• 20 g

• 50 g

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

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.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

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

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

Identify the ΔT for the given problem.

• 25°C

• 175°C

• 150°C

• 200°C

Tags

NGSS.HS-PS3-1

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

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.MS-PS3-3