Specific Isochoric Heat Capacity Measurements for Liquid Isobutane

Published

January 1, 2003

Author(s)

Hiroyuki Miyamoto, Hiroshi Kitajima, Noboru Kagawa, Joe W. Magee, Seizo Tsuruno, Koichi Watanabe

Abstract

Experimental specific isochoric heat capacities (C_v) and PρT properties for isobutane are presented that were measured with a twin-cell type adiabatic isochoric calorimeter. The measurements were obtained for temperatures from 272 to 408 K and for pressures up to 30 MPa. The sample purity was 99.99 mol%. The expanded uncertainties (I.E., a coverage factor k=2) are plus or minus} 13 mK for temperature, plus or minus} 8 kPa for pressure, plus or minus} 0.16% for density, and plus or minus} 3.6% for C_v in the liquid phase. An evaluation and a comparison of the experimental data with highly reliable equations of state confirmed satisfactorily the thermodynamic consistency of the present measurements.

Proceedings Title

Asian Conf. on Refrigeration and Air Conditioning, Proc.

Conference Location

Kobe, 1, JA

Conference Title

Asian Conf. on Refrigeration and Air Conditioning

Pub Type

Conferences

Citation

Miyamoto, H. , Kitajima, H. , Kagawa, N. , Magee, J. , Tsuruno, S. and Watanabe, K. (2003), Specific Isochoric Heat Capacity Measurements for Liquid Isobutane, Asian Conf. on Refrigeration and Air Conditioning, Proc., Kobe, 1, JA (Accessed April 24, 2024)