Question

2.8. The surface tension of water $gamma$ in dynes per centimeter is given by the empirical equation (W. D. Harkins: The Physical Chemistry of Surface Films, Reinhold, New York, 1952, p. 76.), $gamma = 75.796 - 0.145 heta - 0.00024 heta^2$, where $ heta$ is the Celsius temperature. Calculate the change of surface tension with respect to temperature $ heta$, $dgamma/d heta$, at 10°C and 60°C.

          2.8. The surface tension of water $gamma$ in dynes per centimeter is given by the empirical equation (W. D. Harkins: The Physical Chemistry of Surface Films, Reinhold, New York, 1952, p. 76.),
$gamma = 75.796 - 0.145	heta - 0.00024	heta^2$,
where $	heta$ is the Celsius temperature. Calculate the change of surface tension with respect to temperature $	heta$, $dgamma/d	heta$, at 10°C and 60°C.