A student carries out four experiments to investigate the rate of reaction between 3.0 g of
calcium carbonate and hydrochloric acid.

$CaC{O_3}\left( s \right) + 2HCl\left( {aq} \right) \to CaC{l_2}\left( {aq} \right) + C{O_2}\left( g \right) + {H_2}O\left( l \right)$

experiment 1   $CaC{O_3}powder + 2.0mol\,d{m^{ - 3}}HCL\,at\,{35^ \circ }C$

experiment 2   $CaC{O_3}powder + 2.0mol\,d{m^{ - 3}}HCL\,at\,{35^ \circ }C$

experiment 3  $l\arg e\,chips\,of\,CaC{O_3} + 1.0mol\,d{m^{ - 3}}HCL\,at\,room\,temperature$

experiment 4  $l\arg e\,chips\,of\,CaC{O_3} + 1.0mol\,d{m^{ - 3}}HCL\,at\,{35^ \circ }C$

The student collects the $C{O_2}\left( g \right)$ and times how long it takes to produce the same volume of gas for each experiment.

What could be the correct times for the four experiments?