Energy Theorem and Thermal Energy

A car engine releases 5.6x10²kj of energy as it cools. What is the change in temperature if 1.8kg of methanol is used as a coolant? (specific heat of methanol: 2450 J/kg-K)
2 Sig fig

• 0.13 °C
• 2.4x10⁶ °C
• 130 °C
• 2.4x10⁹ °C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

A calorimeter contains 0.0750kg of water at 97.0°C. A 0.0370kg block of copper at 19.0°C is placed in the water. What is the final temperature of the system.
3 sig fig

• 90.1°C
• 91.5°C
• 93.6°C
• 94.2°C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

A 9.75-kg block of metal requires 6.14x10² kJ of heat to change from a solid to a liquid at its melting point. What is the metal?
2 sig fig

• Gold
• Iron
• Lead 
• Silver

Tags

NGSS.HS-PS3-4

A 150.0-g copper cylinder at 425°C is placed on a large block of ice at 0.00°C. Assume that no energy is transferred to the surroundings. What is the mass of the ice that will melt?
3 sig figs

• 50100kg
• 0.0735kg
• 24500J
• -24500J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

How much heat is absorbed from the surroundings when 81 g of 0.0°C ice in a beaker melts and warms to 10°C?  
2 Sig Figs

• 0.34kJ
• 30kJ
• 27kJ
• 190kJ

Tags

NGSS.HS-PS3-4

How much heat is added to 10.0 g of ice at -20.0°C to convert it to steam at 120.0°C?
3 Sig Figs

• 3.09x10⁴J
• 5850J
• 2.58x10⁶J
• 3.09kJ

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4