K/A C/P

Calculate the rate at which B and C are formed if A is consumed at 3.6x10^-4 M/s 2A → 4 B + C

B: 7.2 x 10^{-4} C: 1.8 x 10{-4} Since A is half the rate of B, and twice the rate of C, we can set it up as an equation: A= 2B 2A= C A = 3.6 x 10^\text{-4}-4start superscript, start text, negative, 4, end text, end superscript M/s, B must be 7.2 x 10^{-4}-4 C must be 1.8 x 10^\text{-4}-4start superscript, start text, negative, 4, end text, end superscript M/s

In a system undergoing adiabatic compression, what are the values of internal energy and heat if work done on the system is 500 J

Internal energy is 500 J and heat is 0 J

An isolated electrochemical cell that indefinitely generates an electrical current.

The first law of thermodynamics states that energy and matter cannot be created or destroyed, but only converted from one form to another. The creation of matter and energy in a closed system is a violation of this law. The spring, the machine, and the wind turbine examples all deal with the conversion of energy from one form to another and do not violate the first law of thermodynamics. However, the electrochemical cell that will indefinitely generate electricity is an example where energy is being created in a closed system without external energy input. This is a direct violation of the conservation of energy.

Atmospheric gases absorb more energy than they emit. If we consider a gas to be a closed system, which of the following is true?

The heat absorbed by the gas is positive.

Equal amounts of heat are absorbed by 100 g samples of various solid metals with differing specific heat values. Which of the following statements is true regarding metals and their specific heat values?

The metal with the greatest specific heat will undergo the smallest change in temperature.

The Arrhenius equation, k=Ae^\t{-Ea/(RT)}-Ea/(RT) gives the relationship of the rate constant of a reaction to the temperature (T) and the activation energy (Ea). If a catalyst is added that decreases the activation energy by 20 kJ/mol, and simultaneously the temperature is decreased by 20 K, which of the following will be true of the reaction?

The reaction rate will increase overall