According to the text, what gas can disable the catalyst if it contaminates the PEM fuel cell?
A) NOx B) N2O C) CO2 D) CO
D
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A piston-cylinder device initially contains 100 kg of liquid water at T = 353.15 K and P = 0.1 MPa. The device is isobarically heated, expanding against an external pressure of 0.1 MPa, until exactly 12 % of the water has vaporized, with the rest remaining in the liquid phase. How much heat was added?
A. 2. MJ B. 35.5 MJ C. 7.7 MJ D. 37.5 MJ E. Insufficient information to solve
Siamese cylinder bores are ________
A) Cylinders that do not have a coolant passage between them B) Aluminum cylinders C) Cast iron cylinders D) Another name for cylinder liners
When a municipality requires a concrete slab to be insulated to prevent heat loss, the insulation must always be placed on top of the slab.
Answer the following statement true (T) or false (F)
When an electron breaks away from its covalent bond, the space previously occupied by the electron is referred to as a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).