Students record pressure with a gauge that reads 10 kPa too high at all pressures and…

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

Students record pressure with a gauge that reads 10 kPa too high at all pressures and obtain the linear relation Pmeas=0.37T+100P_{\text{meas}}=0.37T+100 (pressures in kPa, temperatures in °C). Extrapolating this relation to Pmeas=0P_{\text{meas}}=0 gives −270 °C for absolute zero. After correcting for the gauge offset, which of the following most nearly gives the true value of absolute zero in Celsius? (a) −297 ∘C-297\,^{\circ}\text{C} (b) −270 ∘C-270\,^{\circ}\text{C} (c) −243 ∘C-243\,^{\circ}\text{C} (d) −257 ∘C-257\,^{\circ}\text{C}

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