شرحِ تعامل اور حرارتی تبدیلی

What are the units of the rate constant of a first order reaction?

• 1 mol s
• 2 dm^3 mol^-1 s^-1
• 3 s^-1
• 4 mol dm^-3 s^-1

According to the Arrhenius equation, raising the temperature:

• 1 Decreases the rate constant
• 2 Increases the rate constant
• 3 Makes the activation energy negative
• 4 Has no effect on the rate constant

The enthalpy of neutralisation of a strong acid with a strong base is about:

• 1 -570 kJ/mol
• 2 +57 kJ/mol
• 3 0 kJ/mol
• 4 -57 kJ/mol

The order of a reaction can be determined:

• 1 From the molar mass
• 2 From the colour of the products
• 3 From the balanced equation alone
• 4 Only by experiment

For a reaction with rate = k[A]^2, doubling [A] makes the rate:

• 1 Double
• 2 Eight times as large
• 3 Unchanged
• 4 Four times as large