Chemistry

Problem

A student dissolves 5.0 g of an unknown salt in 100 mL of water. The temperature of the water increases from

22.0^{\circ}\text{C}

27.5^{\circ}\text{C}

. Based on this observation, which statement correctly characterizes the process, taking the dissolving salt and water together as the system? a) The process is endothermic and

q_{\text{system}}>0

. b) The process is exothermic and

q_{\text{system}}<0

. c) The process is exothermic and

q_{\text{system}}>0

. d) The sign of

q_{\text{system}}

cannot be determined without the heat capacity of the solution.

Browse the problem library