Onramps Unit 3

Which of the following statements is/are true concerning the first law of thermodynamics?

• I, III

• I only

• I, II, III

• I, II

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

A mixture of ice and water is heated to 50℃. What constants are needed to calculate the amount of heat introduced into the system?

• C_ice, ∆H_fus, C_water

• C_water

• C_ice, ∆H_fus, C_water ∆H_vap, C_gas

• ∆H_fus, C_water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the change in enthalpy (∆H) for the reaction from A → B?

• -50 kJ endothermic

• -150 kJ endothermic

• +50 kJ endothermic

• +300 kJ, exothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

• -980.8 kJ/mol

• -1650 kJ/mol

• -380.2 kJ/mol

• -15.2 kJ mol

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is a fundamental concept of the first law of thermodynamics?

• Energy cannot be created or destroyed, only transformed.

• Entropy of a system always increases.

• Energy is always conserved in an isolated system.

• Heat flows from cold to hot spontaneously.

Tags

NGSS.MS-PS3-5

What constants are needed to calculate the heat required to change ice at -10℃ to steam at 100℃?

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following best describes the process of photosynthesis?

• Conversion of chemical energy into light energy.

• Conversion of light energy into chemical energy.

• Conversion of thermal energy into mechanical energy.

• Conversion of electrical energy into chemical energy.

Tags

NGSS.MS-LS1-6

In an experiment, a student measures the temperature change of a substance. Which of the following instruments is most appropriate for this measurement?

• Thermometer

• Barometer

• Voltmeter

• Spectrometer

Tags

NGSS.MS-PS3-4

Which of the following is an example of a chemical change?

• Melting of ice

• Rusting of iron

• Boiling of water

• Breaking of glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the primary function of the mitochondria in cells?

• Protein synthesis

• Photosynthesis

• Energy production

• Cell division

Tags

NGSS.MS-LS1-2