Answers FPS Conceptual Science BLab: Enthalpy

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A copper rod that has a mass of 200.0 g has an initial temperature of 20.0°C and is heated to 40.0°C. If 1,540 J of heat are needed to heat the rod, what is the specific heat of copper?Use .

0.0130 J/(gi°C)

0.0649 J/(gi°C)

0.193 J/(gi°C)

0.385 J/(gi°C)

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The combustion of glucose, C6 H12 O6 (s), produces carbon dioxide, CO2 (g), and water, H2 O(g), according to the equation below.The enthalpy of the reaction is –2,840 kJ. What is the heat of combustion, per mole, of glucose?

–2,840 kJ/mol

–473.3 kJ/mol

473.3 kJ/mol

2,840 kJ/mol

Which statement defines specific heat capacity for a given sample?

the temperature of a given sample

the temperature that a given sample can withstand

the quantity of heat that is required to raise the sample’s temperature by 1°C (Kelvin)

the quantity of heat that is required to raise 1 g of the sample by 1°C (Kelvin) at a constant pressure

Which defines the average kinetic energy of a system’s particles?

density

pressure

temperature

volume

When ammonium chloride is dissolved in water, the beaker gets cold. Which type of reaction does this describe?

exothermic

endothermic

both exothermic and endothermic

neither exothermic nor endothermic

Which statement best explains the change that occurs when gas particles move more slowly?

The temperature increases because the average kinetic energy decreases.

The temperature increases because the average kinetic energy increases.

The temperature decreases because the average kinetic energy decreases.

The temperature decreases because the average kinetic energy increases.

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