On a sunny day, the chair with a lower heat capacity would be the hottest to sit in. <span> The SPECIFIC </span>HEAT CAPACITY of a substance<span> is the </span>heat<span> needed to raise the temperature of 1 kg of the </span>substance<span> by 1K. This means that the lower the heat capacity, the less energy needed to raise the temperature so the rate of increasing the temperature would be faster. Hoep this answers the question. Have a nice day.</span>