Chem 110A Chapter 5 T/F Questions

The standard state implies that the temperature is 0 degrees

False

The term standard state implies that the temperature is 25 degrees

False

The standard State of a pure gas is the pure gas is the pure gas at a pressure of 1 bar and temperature T

False

The SI units of ∆H° for a reaction are J

False

Doubling the coefficients of a reaction doubles its ∆H°

True

∆H° depends on temperature

True

The reaction N2 + 3H2 → 2NH3 has Σv=-2

True

f∆H°298 is zero for O(g)

False

f∆H°298 is 0 for O2(g)

True

f∆H°400 is zero for O2(g)

True

When sucrose is burned in an adiabatic constant - volume calorimeter, ∆U = 0 for combustion process, where the system is the calorimeter

True

The reaction N2(g) + 3H2(g) → 2NH3 (g) has ∆H°T<∆U°T

True

The reaction N2(g) → 2N(g) is endothermic

True

when an exothermic reaction is carried out in an adiabatic container, the products are at a higher temperature than the reactants

True

For CH3OH (l), f∆H°298-f∆U°298 [where H2O is formed in the combustion reaction

False

The rate of change ∆H° with respect to temperature is equal to ∆C°p

True

The rate of change of ∆H° with respect to pressure is zero

True

For a reaction involving only ideal gases, ∆C°p is independent of temperature

False

integral TdT =½(T2-T1)²

False

For the combustion of glucose, ∆S°T equals ∆H°T/T

F

When an exothermic reaction in a closed system with P-V work only is run under isobaric and adiabatic conditions, ∆H=0

True

When a substance is in

G of an element in its stable form and in its standard state at 25 C is taken to be 0

False