Please help in understanding about work and heat. When elemental Zinc reacts with aqueous HCl, the container heats up and hydrogen gas is generated. What are the signs of heat and work for this process? Zn +HCI(aq) H2(g) Heat >O Work0 Work 0W Heat Solution Since container heat up during the reaction and Hydrogen gas is generated it means heat releases during the reaction therefore Heat < 0 Work < 0.