Batteries and Fuel Cells

Question 1

define batterie

Answer 1

a chemical energy store that transfers energy to electrical current by a chemical reaction

Question 2

what is the equation for a batterie

Answer 2

A + B-> C

Question 3

define rechargeable batterie

Answer 3

cells that can be recharged and chemical reactions can be reversed when electrical current is supplied (recharged)

Question 4

what is the equation for rechargeable batteries

Answer 4

D + E F

Question 5

define fuel cell

Answer 5

when a source of fuel is oxidised within a cell to produce a potential difference (voltage)

Question 6

describe what happens in a fuel cell

Answer 6

hydrogen and air entered cell
hydrogen is oxidised (loses electrons) electrochemically with air
waste product is water
reaction produces voltage

Question 7

list 2 advantages of fuel cells

Answer 7

no pollution

works 24 hours

Question 8

list 2 disadvantages of a fuel cell

Answer 8

not enough hydrogen

hydrogen is produced by fossil fuels

Question 9

list 3 uses of fuel cells

Answer 9

power source for remote locations
hydrogen powered transport
portable power systems